World's coolest zip lines: Adrenaline junkies can test their nerve on the world's longest zip line in Ras Al Khaimah -- it's an incredible 2.83 kilometers long -- equivalent to 28 end-to-end soccer fields.
Courtesy Ras Al Khaimah Tourism Development Authority
Courtesy Ras Al Khaimah Tourism Development Authority
World's coolest zip lines: The mountainous setting of the zip wire offers a different experience from its urban counterparts across the world.
Courtesy Ras Al Khaimah Tourism Development Authority
World's coolest zip lines: Aside from the spectacular length, guests can also fly through the sky at speeds of up to 150 kph (93mph).
Courtesy Ras Al Khaimah Tourism Development Authority
World's coolest zip lines: In July 2017 London opened a temporary new zip wire in the city's Archbishop's Park -- the world's biggest and fastest city-center zip line.
Carl Court/Getty Images Europe/Getty Images
World's coolest zip lines: London's zip wire was the brainchild of Zip World Wales -- who created the legendary Velocity zip wire, the fastest zip line in the world and the longest in Europe.
Courtesy ZipWorld Wales
World's coolest zip lines: Zip World Wales also designed Titan -- which allows groups of four to zip together over the Welsh countryside.
Courtesy ZipWorld Wales
World's coolest zip lines: A temporary zip line in Paris opened for two weeks in June 2017: riders could travel from midway up the Eiffel Tower all the way to Champs de Mars gardens.
FRANCOIS GUILLOT/AFP/AFP/Getty Images
World's coolest zip lines: In coastal Alaska, adventurers can enjoy the zip wire at Icy Strait Point, featuring six cables side by side, with an average speed of 60 mph -- and stunning views.
Courtesy Icy Strait Point
World's coolest zip lines: England's longest and fastest zip wire is located at the Eden Project in Cornwall, a popular visitor attraction in southwest England.
Courtesy Eden Project
World's coolest zip lines: Thrill seekers at the Eden Project can plummet across Cornwall at 50 mph.
Courtesy Eden Project
World's coolest zip lines: In Hawaii, zip line enthusiasts can enjoy five options at Skyline Eco-Adventures, Haleakala in Maui -- traveling across canyons with 90-foot (27 meter) drops.
Courtesy Skyline Eco-Adventures Haleakala Maui tour
World's coolest zip lines: In Hocking Hill, Ohio, in the United States, zip line fans can enjoy flying through the wild Ohio forest scenery on a dual wire.
Courtesy ZipOhio
World's coolest zip lines: After soaring through the tree canopy, ZipOhio riders swoop down to the middle of the Hocking River.
Courtesy ZipOhio
World's coolest zip lines: Zipflyer Nepal is the world's steepest zip line -- with an elevation drop of 600 meters/2000 feet.
Courtesy Zipflyer Nepal
World's coolest zip lines: Nepal's wire is probably not for the faint-hearted -- it also claims to be the world's fastest and the longest.
Courtesy Zipflyer Nepal
World's coolest zip lines: If you can brave the drop, ZipFlyer Nepal also offers stunning views across forest canopies.
Courtesy Zipflyer Nepal
World's coolest zip lines: Another self-titled "Monster" is situated in Peru -- this zip line allows brave fliers to zip over Incan ruins.
Courtesy Colca Ziplining
World's coolest zip lines: In Costa Rica, Sky Adventures offers a thrilling zip line circuit, located in Monteverde and La Fortuna parks -- perfect for channeling your inner superhero.
Courtesy Costa Rica Sky Adventures
World's coolest zip lines: Zip liners in Costa Rica can experience the glory of the rainforest from above.
