<strong>Whale Trail, South Africa: </strong>Hikers rest on the cliffs near Vaalkrans.
Whale Trail, South Africa: Hikers rest on the cliffs near Vaalkrans.
Megan King
<strong>Whale Trail, South Africa: </strong>The 10-kilometer stretch between Hammerkop and Vaalkrans is mostly a beach walk.
Whale Trail, South Africa: The 10-kilometer stretch between Hammerkop and Vaalkrans is mostly a beach walk.
Megan King
<strong>Hadrian's Wall: </strong>
Hadrian's Wall:
courtesy Visit Britain
Reenactors portraying soldiers from the Imperial Roman Army photograph themselves using a 'selfie-stick' as they stand in front of Hadrian's Wall during English Heritage's history weekend, "Hadrians Wall Live", at Birdoswald Roman Fort near Gilsland, northern England on September 5, 2015. The "Hadrian's Wall Live" event, which takes place on September 5 and 6, features Roman history reenactments taking place at various points along the length of the World Heritage Site fortification, including a battle between the Barbarian and Roman Soldiers of 143 AD. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images)
Reenactors portraying soldiers from the Imperial Roman Army photograph themselves using a 'selfie-stick' as they stand in front of Hadrian's Wall during English Heritage's history weekend, "Hadrians Wall Live", at Birdoswald Roman Fort near Gilsland, northern England on September 5, 2015. The "Hadrian's Wall Live" event, which takes place on September 5 and 6, features Roman history reenactments taking place at various points along the length of the World Heritage Site fortification, including a battle between the Barbarian and Roman Soldiers of 143 AD. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images)
OLI SCARFF/AFP/AFP/Getty Images
<strong>Haute Route, France: </strong>Racers' minors lamps light the path in front of the Matterhorn mountain as they leave the Zermatt ski resort at the start of the Glacier Patrol, a famous ski alpinism race late on April 21, 2010 in Zermatt. The Glacier Patrol (Patrouille des Glaciers) organized by the Swiss Army sees highly-experienced hiker-skiers trek across the Haute Route along the Swiss-Italian border from Zermatt to Verbier. The race covers 53km (31.8 miles) by foot and ski, with over 7000m gained and lost along the way. AFP PHOTO FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)
Haute Route, France: Racers' minors lamps light the path in front of the Matterhorn mountain as they leave the Zermatt ski resort at the start of the Glacier Patrol, a famous ski alpinism race late on April 21, 2010 in Zermatt. The Glacier Patrol (Patrouille des Glaciers) organized by the Swiss Army sees highly-experienced hiker-skiers trek across the Haute Route along the Swiss-Italian border from Zermatt to Verbier. The race covers 53km (31.8 miles) by foot and ski, with over 7000m gained and lost along the way. AFP PHOTO FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)
FABRICE COFFRINI/AFP/AFP/Getty Images
<strong>Grand Canyon: </strong>GRAND CANYON NATIONAL PARK, AR - JULY 13: A visitor walk down the South Keibab Trail at the Grand Canyon South Rim on July 13, 2014 at Grand Canyon National Park, Arizona. The Grand Canyon is among the state's biggest tourist destinations. (Photo by Sean Gallup/Getty Images)
Grand Canyon: GRAND CANYON NATIONAL PARK, AR - JULY 13: A visitor walk down the South Keibab Trail at the Grand Canyon South Rim on July 13, 2014 at Grand Canyon National Park, Arizona. The Grand Canyon is among the state's biggest tourist destinations. (Photo by Sean Gallup/Getty Images)
Sean Gallup/Getty Images Europe/Getty Images
<strong>Grand Canyon: </strong>A general view of the South Rim of the Grand Canyon in Grand Canyon National Park, Arizona, on February 13, 2017. / AFP PHOTO / RHONA WISE (Photo credit should read RHONA WISE/AFP/Getty Images)
Grand Canyon: A general view of the South Rim of the Grand Canyon in Grand Canyon National Park, Arizona, on February 13, 2017. / AFP PHOTO / RHONA WISE (Photo credit should read RHONA WISE/AFP/Getty Images)
RHONA WISE/AFP/AFP/Getty Images
<strong>Chiang Mai, Thailand: </strong>The roads around Chiang Mai are touted as some of the most scenic in the country. One of the best known is the Mae Hong Son Loop, a 600-kilometer journey that starts from Chiang Mai, and if traveling counterclockwise, passes through Pai, Mae Hong Son, Mae Sariang, then back to the source.
Chiang Mai, Thailand: The roads around Chiang Mai are touted as some of the most scenic in the country. One of the best known is the Mae Hong Son Loop, a 600-kilometer journey that starts from Chiang Mai, and if traveling counterclockwise, passes through Pai, Mae Hong Son, Mae Sariang, then back to the source.
Courtesy Harry Vowell
<strong>Pacific Crest Trail: </strong>CAMPO, CA - JULY 20: A monument marks the southern terminus of the Pacific Crest Trail, which stretches from Canada to Mexico, at the border where nightly patrols by citizen volunteers searching for people crossing into the US illegally from Mexico are occurring, in the early morning hours of July 20, 2005 near Campo, California in eastern San Diego County. The California Border Watch, members of the Arizona Minutemen, and other volunteers carry guns for self-defense and phone the US Border Patrol to report any illegal immigrants they find. They are shadowed by migrant activist protesters opposed to their actions who have been taunting them at regular intervals day and night. The new patrols come as the U.S. Congress considers immigration policy and how to treat the estimated 11 million illegal immigrants already in the United States. (Photo by David McNew/Getty Images)
Pacific Crest Trail: CAMPO, CA - JULY 20: A monument marks the southern terminus of the Pacific Crest Trail, which stretches from Canada to Mexico, at the border where nightly patrols by citizen volunteers searching for people crossing into the US illegally from Mexico are occurring, in the early morning hours of July 20, 2005 near Campo, California in eastern San Diego County. The California Border Watch, members of the Arizona Minutemen, and other volunteers carry guns for self-defense and phone the US Border Patrol to report any illegal immigrants they find. They are shadowed by migrant activist protesters opposed to their actions who have been taunting them at regular intervals day and night. The new patrols come as the U.S. Congress considers immigration policy and how to treat the estimated 11 million illegal immigrants already in the United States. (Photo by David McNew/Getty Images)
David McNew/Getty Images North America/Getty Images
<strong>Fitz Roy Massif, Patagonia, Argentina: </strong>View of the Mount Fitz Roy near El Chalten town, in Santa Cruz province, Argentina on March 18, 2014. AFP PHOTO / MARIO GOLDMAN (Photo credit should read MARIO GOLDMAN/AFP/Getty Images)
Fitz Roy Massif, Patagonia, Argentina: View of the Mount Fitz Roy near El Chalten town, in Santa Cruz province, Argentina on March 18, 2014. AFP PHOTO / MARIO GOLDMAN (Photo credit should read MARIO GOLDMAN/AFP/Getty Images)
MARIO GOLDMAN/AFP/AFP/Getty Images
<strong>Fitz Roy Massif, Patagonia, Argentina: </strong>View of the Mount Fitz Roy near El Chalten town, in Santa Cruz province, Argentina on March 18, 2014. AFP PHOTO / MARIO GOLDMAN (Photo credit should read MARIO GOLDMAN/AFP/Getty Images)
Fitz Roy Massif, Patagonia, Argentina: View of the Mount Fitz Roy near El Chalten town, in Santa Cruz province, Argentina on March 18, 2014. AFP PHOTO / MARIO GOLDMAN (Photo credit should read MARIO GOLDMAN/AFP/Getty Images)
MARIO GOLDMAN/AFP/AFP/Getty Images
<strong>Mount Fuji, Japan: </strong>The trace of climbers' flashlights is seen as people hike to the summit of Mount Fuji, Japan's highest peak at 3,776 meters, in Yamanashi prefecture on July 1, 2013 as the mountain's climbing season began. The UNESCO granted World Heritage status to Mount Fuji in June 2013. AFP PHOTO / JIJI PRESS JAPAN OUT (Photo credit should read STR/AFP/Getty Images)
Mount Fuji, Japan: The trace of climbers' flashlights is seen as people hike to the summit of Mount Fuji, Japan's highest peak at 3,776 meters, in Yamanashi prefecture on July 1, 2013 as the mountain's climbing season began. The UNESCO granted World Heritage status to Mount Fuji in June 2013. AFP PHOTO / JIJI PRESS JAPAN OUT (Photo credit should read STR/AFP/Getty Images)
AFP/AFP/AFP/Getty Images
<strong>Mount Fuji, Japan: </strong>FUJIYOSHIDA, JAPAN - JULY 02: Tourists pass a rest stop as they hike to the summit of Mt Fuji on July 2, 2015 in Fujiyoshida, Japan. Mt Fuji is Japan's highest peak and was named a UNESCO Heritage site in 2013, due to the popularity of climbing on Mt Fuji concerns for the preservation of the area have forced local governments to look at ways to control visitor numbers. During peak season, between July and September the summit trails on Mt Fuji are so congested with climbers they are close enough to touch. In 2014 the Yamanashi prefectural government extended traffic restrictions on vehicles entering the toll way to the foot of the mountain, as a result climber numbers for the July- August period of 2014 was down 21.6 percent to 243,662. As the 2015 climbing season begins, local governments are again looking at implementing traffic restrictions and are considering introducing a ?1,000 climbing charge per person, but have seen resistance from local businesses, complaining that the restrictions would interfere with tourism and effect their business while not significantly bringing down climbers. (Photo by Chris McGrath/Getty Images)
Mount Fuji, Japan: FUJIYOSHIDA, JAPAN - JULY 02: Tourists pass a rest stop as they hike to the summit of Mt Fuji on July 2, 2015 in Fujiyoshida, Japan. Mt Fuji is Japan's highest peak and was named a UNESCO Heritage site in 2013, due to the popularity of climbing on Mt Fuji concerns for the preservation of the area have forced local governments to look at ways to control visitor numbers. During peak season, between July and September the summit trails on Mt Fuji are so congested with climbers they are close enough to touch. In 2014 the Yamanashi prefectural government extended traffic restrictions on vehicles entering the toll way to the foot of the mountain, as a result climber numbers for the July- August period of 2014 was down 21.6 percent to 243,662. As the 2015 climbing season begins, local governments are again looking at implementing traffic restrictions and are considering introducing a ?1,000 climbing charge per person, but have seen resistance from local businesses, complaining that the restrictions would interfere with tourism and effect their business while not significantly bringing down climbers. (Photo by Chris McGrath/Getty Images)
Chris McGrath/Getty Images AsiaPac/Getty Images
<strong>Camino de Santiago: </strong>TO GO WITH AFP STORY BY ELISA SANTAFE- A pilgrim walks the Way of Saint James close to the Monte do Gozo Mountains, some 10 km from Santiago de Compostela, northwestern Spain, on July 21, 2010. Thousands of pilgrims arrive to Santiago for the Roman Catholic celebrations of the Saint James Holy Year to seek absolution and spiritual enlightenment. AFP PHOTO/MIGUEL RIOPA (Photo credit should read MIGUEL RIOPA/AFP/Getty Images)
Camino de Santiago: TO GO WITH AFP STORY BY ELISA SANTAFE- A pilgrim walks the Way of Saint James close to the Monte do Gozo Mountains, some 10 km from Santiago de Compostela, northwestern Spain, on July 21, 2010. Thousands of pilgrims arrive to Santiago for the Roman Catholic celebrations of the Saint James Holy Year to seek absolution and spiritual enlightenment. AFP PHOTO/MIGUEL RIOPA (Photo credit should read MIGUEL RIOPA/AFP/Getty Images)
MIGUEL RIOPA/AFP/AFP/Getty Images
<strong>Camino de Santiago: </strong>TO GO WITH AFP STORY BY ELISA SANTAFE- A pilgrim walks the Way of Saint James, some 15 km from Santiago de Compostela, northwestern Spain, on July 21, 2010. Thousands of pilgrims arrive to Santiago for the Roman Catholic celebrations of the Saint James Holy Year to seek absolution and spiritual enlightenment. AFP PHOTO/MIGUEL RIOPA (Photo credit should read MIGUEL RIOPA/AFP/Getty Images)
Camino de Santiago: TO GO WITH AFP STORY BY ELISA SANTAFE- A pilgrim walks the Way of Saint James, some 15 km from Santiago de Compostela, northwestern Spain, on July 21, 2010. Thousands of pilgrims arrive to Santiago for the Roman Catholic celebrations of the Saint James Holy Year to seek absolution and spiritual enlightenment. AFP PHOTO/MIGUEL RIOPA (Photo credit should read MIGUEL RIOPA/AFP/Getty Images)
MIGUEL RIOPA/AFP/AFP/Getty Images
<strong>Everest Base Camp, Nepal: </strong>A general view from Everest Base Camp towards the summit of Mount Everest in Nepal on May 17, 2009. Bad weather conditions forced three Nepalese Sherpa brothers to give up their plans to set a new world record by spending 24 hours in the "death zone" on top of Mount Everest. Pemba Dorje Sherpa, 30, and his two younger brothers reached the summit on May 19, but were forced down after only two hours, Pemba told AFP after returning to Kathmandu. AFP PHOTO/COURTESY OF PEMBA DORJE SHERPA (Photo credit should read STR/AFP/Getty Images)
Everest Base Camp, Nepal: A general view from Everest Base Camp towards the summit of Mount Everest in Nepal on May 17, 2009. Bad weather conditions forced three Nepalese Sherpa brothers to give up their plans to set a new world record by spending 24 hours in the "death zone" on top of Mount Everest. Pemba Dorje Sherpa, 30, and his two younger brothers reached the summit on May 19, but were forced down after only two hours, Pemba told AFP after returning to Kathmandu. AFP PHOTO/COURTESY OF PEMBA DORJE SHERPA (Photo credit should read STR/AFP/Getty Images)
STR/AFP/AFP/Getty Images
<strong>Appalachian Trail, Eastern United States: </strong>Jeffrey "Portrait" Stylos completes his 2011 thru hike.
Appalachian Trail, Eastern United States: Jeffrey "Portrait" Stylos completes his 2011 thru hike.
Jeffrey Stylos
<strong>Appalachian Trail, Eastern United States: </strong>Hiker taking in the view at McAfee Knob
Appalachian Trail, Eastern United States: Hiker taking in the view at McAfee Knob
Benjamin Hays
<strong>Appalachian Trail, Eastern United States: </strong>View of Mt. Katahdin and the Penobscot River from Abol bridge, Maine. Oct
Appalachian Trail, Eastern United States: View of Mt. Katahdin and the Penobscot River from Abol bridge, Maine. Oct
Scott Gamble
<strong>Kilimanjaro: </strong>A porter carries equipment along a trekking route up Mount Kilimanjaro, Tanzania on September 26, 2014. Mount Kilimanjaro is a dormant volcanic mountain in Tanzania. It is the highest mountain in Africa and the highest free-standing mountain in the world at 5,895 metres or 19,341 feet above sea level. AFP PHOTO/PETER MARTELL (Photo credit should read PETER MARTELL/AFP/Getty Images)
Kilimanjaro: A porter carries equipment along a trekking route up Mount Kilimanjaro, Tanzania on September 26, 2014. Mount Kilimanjaro is a dormant volcanic mountain in Tanzania. It is the highest mountain in Africa and the highest free-standing mountain in the world at 5,895 metres or 19,341 feet above sea level. AFP PHOTO/PETER MARTELL (Photo credit should read PETER MARTELL/AFP/Getty Images)
PETER MARTELL/AFP/AFP/Getty Images
<strong>Kilimanjaro: </strong>Hikers with along a trekking route at Mount Kilimanjaro, Tanzania on September 26, 2014. Mount Kilimanjaro is a dormant volcanic mountain in Tanzania. It is the highest mountain in Africa and the highest free-standing mountain in the world at 5,895 metres or 19,341 feet above sea level. AFP PHOTO/PETER MARTELL (Photo credit should read PETER MARTELL/AFP/Getty Images)
Kilimanjaro: Hikers with along a trekking route at Mount Kilimanjaro, Tanzania on September 26, 2014. Mount Kilimanjaro is a dormant volcanic mountain in Tanzania. It is the highest mountain in Africa and the highest free-standing mountain in the world at 5,895 metres or 19,341 feet above sea level. AFP PHOTO/PETER MARTELL (Photo credit should read PETER MARTELL/AFP/Getty Images)
PETER MARTELL/AFP/AFP/Getty Images
<strong>Incan trail, Peru: </strong>A man walks along a section of the Inca trail near the Huaycan de Cieneguilla archaeological site, in Cieneguilla, 70 km east from Lima on December 12, 2012. A group of archaeologists have been working for five years in the recovery and preservation of the site. AFP PHOTO/ ERNESTO BENAVIDES (Photo credit should read ERNESTO BENAVIDES/AFP/Getty Images)
Incan trail, Peru: A man walks along a section of the Inca trail near the Huaycan de Cieneguilla archaeological site, in Cieneguilla, 70 km east from Lima on December 12, 2012. A group of archaeologists have been working for five years in the recovery and preservation of the site. AFP PHOTO/ ERNESTO BENAVIDES (Photo credit should read ERNESTO BENAVIDES/AFP/Getty Images)
AFP/AFP/AFP/Getty Images
<strong>Koko Crater, Honolulu: </strong>
Koko Crater, Honolulu:
Hawaii Tourism Europe
<strong>Koko Crater, Honolulu: </strong>
Koko Crater, Honolulu:
Hawaii Tourism Europe
<strong>Milfore Track, Fiordland National Park, New Zealand:</strong><br />
Milfore Track, Fiordland National Park, New Zealand:
courtesy Tourism New Zealand
<strong>Milfore Track, Fiordland National Park, New Zealand:</strong>
Milfore Track, Fiordland National Park, New Zealand:
courtesy DOC 90 Seconds
<strong>Milfore Track, Fiordland National Park, New Zealand:</strong>
Milfore Track, Fiordland National Park, New Zealand:
courtesy Ultimate Hikes
<strong>Tasmanian Overland Trek: </strong>Overland Track, Barn Bluff, Cradle Mountain - Tasmanian Expeditions
Tasmanian Overland Trek: Overland Track, Barn Bluff, Cradle Mountain - Tasmanian Expeditions
Tourism Tasmania & Anne Jordan
Dogon Country, Mali
Dogon Country, Mali
courtesy Tourist Office of Mopti
Dogon Country, Mali
Dogon Country, Mali
courtesy Tourist Office of Mopti
Dogon Country, Mali
Dogon Country, Mali
courtesy Tourist Office of Mopti
Dogon Country, Mali
Dogon Country, Mali
courtesy Tourist Office of Mopti
Fagaraz Traverse, Romania
Fagaraz Traverse, Romania
courtesy Romania Tourism
Fagaraz Traverse, Romania
Fagaraz Traverse, Romania
courtesy Romania Tourism
Fagaraz Traverse, Romania
Fagaraz Traverse, Romania
courtesy Romania Tourism
Denali, Alaska<br />
Denali, Alaska
Ben Adkison/CNN
Denali, Alaska: A view of Denali, formerly known as Mt. McKinley, on September 1, 2015 in Denali National Park, Alaska. According to the National Park Service, the summit elevation of Denali is 20,320 feet and is the highest mountain peak in North America. (Photo by Lance King/Getty Images)
Denali, Alaska: A view of Denali, formerly known as Mt. McKinley, on September 1, 2015 in Denali National Park, Alaska. According to the National Park Service, the summit elevation of Denali is 20,320 feet and is the highest mountain peak in North America. (Photo by Lance King/Getty Images)
Lance King/Getty Images
Matterhorn, Switzerland:<br />ZERMATT, SWITZERLAND - JUNE 30: Visitors walk on snow as the Matterhorn stands behind near Sunnegga station on June 30, 2013 near Zermatt, Switzerland. Zermatt is among Switzerland's most famous winter and summer tourism destinations. (Photo by Sean Gallup/Getty Images)
Matterhorn, Switzerland:
ZERMATT, SWITZERLAND - JUNE 30: Visitors walk on snow as the Matterhorn stands behind near Sunnegga station on June 30, 2013 near Zermatt, Switzerland. Zermatt is among Switzerland's most famous winter and summer tourism destinations. (Photo by Sean Gallup/Getty Images)
Sean Gallup/Getty Images Europe/Getty Images
Matterhorn, Switzerland:<br />Lamps illuminate the path of the first climb on the Matterhorn mountain late on July 13, 2015 in Zermatt. The resort celebrates this year the 150th anniversary of the iconic Alpine mountain's first climb. For a long time the Matterhorn was considered too difficult to climb but on 14 July 1865, British climber Edward Whymper reached its peak (4,478 meters ), as part of a seven-member rope team. During the descent the front four-member rope team fell to their deaths over the north wall. AFP PHOTO / FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)
Matterhorn, Switzerland:
Lamps illuminate the path of the first climb on the Matterhorn mountain late on July 13, 2015 in Zermatt. The resort celebrates this year the 150th anniversary of the iconic Alpine mountain's first climb. For a long time the Matterhorn was considered too difficult to climb but on 14 July 1865, British climber Edward Whymper reached its peak (4,478 meters ), as part of a seven-member rope team. During the descent the front four-member rope team fell to their deaths over the north wall. AFP PHOTO / FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)
FABRICE COFFRINI/AFP/AFP/Getty Images
Laugavegur, Iceland: <br />A picture taken on July 8, 2014 shows the rhyolite mountains in the Landmannalaugar region, a protected area in the southern part of Iceland's highlands some 70km east of Hvolsvollur. AFP PHOTO / JOEL SAGET (Photo credit should read JOEL SAGET/AFP/Getty Images)
Laugavegur, Iceland:
A picture taken on July 8, 2014 shows the rhyolite mountains in the Landmannalaugar region, a protected area in the southern part of Iceland's highlands some 70km east of Hvolsvollur. AFP PHOTO / JOEL SAGET (Photo credit should read JOEL SAGET/AFP/Getty Images)
JOEL SAGET/AFP/AFP/Getty Images