Program note: See how the climate crisis is reshaping life across the US on "Road to Change: America's Climate Crisis" with Bill Weir, Saturday night at 10 ET on CNN.

The world is full of natural wonders, but at a time when borders are closing and travel is restricted, seeing them in person is not a realistic option for many people. Thankfully, technology lets us to see the world virtually and visit these magical places -- if only through our screens.

You may recognize many of the stunning landscapes in this gallery from your own travels, Instagram or your desktop screen savers. For some, they can bring calm to a hectic day or an escape from the reality of a pandemic.

But these images also serve as a warning. Because of human-caused climate change, these incredible places are at grave risk of changing forever.

For 50 years, Earth Day has brought attention to the impacts that people are having on the planet, and to serve as a rallying cry to protect the natural world -- from your neighborhood green space to bucket list destinations.

This year, the theme of Earth Day, which is Wednesday, is a call to action to halt the climate crisis and to preserve these landmarks for generations to come. If not, these photos could look drastically different in another 50 years.

See more of CNN's Earth Day and climate crisis coverage

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<a href="index.php?page=&url=https%3A%2F%2Ffloridadep.gov%2Fsites%2Fdefault%2Ffiles%2FThe%2520Effects%2520of%2520Climate%2520Change%2520on%2520Florida%2527s%2520Ocean%2520and%2520Coastal%2520Resources_0.pdf" target="_blank" target="_blank">Florida Keys</a><br />The Florida Keys are among the most vulnerable places in the US to the effects of the climate crisis. Warm ocean temperatures are bleaching the surrounding reefs. The threat of sea level rise continues to grow. And as always, the possibility of hurricanes looms, with climate change increasing the destructive potential of these tropical storms.
Florida Keys
The Florida Keys are among the most vulnerable places in the US to the effects of the climate crisis. Warm ocean temperatures are bleaching the surrounding reefs. The threat of sea level rise continues to grow. And as always, the possibility of hurricanes looms, with climate change increasing the destructive potential of these tropical storms.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.nps.gov%2Fglac%2Fplanyourvisit%2Fupload%2F2019-Glacier-Waterton-Guide_508.pdf" target="_blank" target="_blank">Glacier National Park</a><br />The park's iconic landscapes were carved by ice over thousands of years. But today, its namesake glaciers are in peril. In 1966, the park had 35 named glaciers, according to the National Park Service. By 2015, nine of those were already inactive, and all of the park's glaciers have shrunk since 1966.
Glacier National Park
The park's iconic landscapes were carved by ice over thousands of years. But today, its namesake glaciers are in peril. In 1966, the park had 35 named glaciers, according to the National Park Service. By 2015, nine of those were already inactive, and all of the park's glaciers have shrunk since 1966.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2019%2F11%2F13%2Feurope%2Fvenice-flooding-state-of-emergency-intl-hnk%2Findex.html" target="_blank">Venice</a><br />Over its more than 1,000-year history, Venice is no stranger to flooding. But with rising seas, its yearly flooding events have become more common and damaging. Just last year, in a cruel twist of irony, the city's Veneto regional council was flooded just minutes after they voted to reject measures to combat climate change.
Venice
Over its more than 1,000-year history, Venice is no stranger to flooding. But with rising seas, its yearly flooding events have become more common and damaging. Just last year, in a cruel twist of irony, the city's Veneto regional council was flooded just minutes after they voted to reject measures to combat climate change.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2020%2F02%2F21%2Fweather%2Fcolorado-river-flow-dwindling-warming-temperatures-climate-change%2Findex.html" target="_blank">Colorado River</a><br />The Colorado River is picturesque, but it also provides water to more than 40 million people, from Denver to Los Angeles. However, its flow has dwindled by 20% compared to the last century, and researchers say the climate crisis is to blame. More than half of the decline in the river's flow is connected to increasing temperatures. As warming continues, they say the risk of "severe water shortages" for the millions that rely on it is expected to grow.
Colorado River
The Colorado River is picturesque, but it also provides water to more than 40 million people, from Denver to Los Angeles. However, its flow has dwindled by 20% compared to the last century, and researchers say the climate crisis is to blame. More than half of the decline in the river's flow is connected to increasing temperatures. As warming continues, they say the risk of "severe water shortages" for the millions that rely on it is expected to grow.
George Rose/Getty Images
<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2020%2F02%2F14%2Fworld%2Fantarctic-peninsula-climate-change-scn-trnd%2Findex.html" target="_blank">Antarctica</a><br />Like the Arctic, Antarctica is warming faster than most of the rest of the world, and the continent is experiencing alarming changes. The warmest temperature ever measured in Antarctica was recorded this year, an iceberg the size of Atlanta broke off from a glacier, and the beloved penguins that call the continent home are declining. The effects of climate change here will be felt worldwide. Antarctica's ice sheets contain enough water to raise global sea levels by nearly 200 feet, according to the World Meteorological Organization.
Antarctica
Like the Arctic, Antarctica is warming faster than most of the rest of the world, and the continent is experiencing alarming changes. The warmest temperature ever measured in Antarctica was recorded this year, an iceberg the size of Atlanta broke off from a glacier, and the beloved penguins that call the continent home are declining. The effects of climate change here will be felt worldwide. Antarctica's ice sheets contain enough water to raise global sea levels by nearly 200 feet, according to the World Meteorological Organization.
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<a href="index.php?page=&url=https%3A%2F%2Farchive.epa.gov%2Fclimatechange%2Fkids%2Fexpeditions%2Fsea-level%2Fsea-level-508.pdf" target="_blank" target="_blank">Maldives</a><br />This exotic getaway is one of the lowest-lying countries in the world, with an average elevation of around 1 meter (3.3 feet) above sea level. As sea levels continue to rise, islands like these and are at risk of sinking beneath the waves in the coming decades.
Maldives
This exotic getaway is one of the lowest-lying countries in the world, with an average elevation of around 1 meter (3.3 feet) above sea level. As sea levels continue to rise, islands like these and are at risk of sinking beneath the waves in the coming decades.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2019%2F12%2F23%2Fasia%2Fasia-pacific-climate-crisis-intl-hnk%2Findex.html" target="_blank">Philippine Cordilleras</a><br />For 2,000 years, the high rice fields of the Philippines have shaped the landscape of the Cordilleras on the island of Luzon. But they are more susceptible than ever before to mudslides, as extreme rain events become more frequent across Southeast Asia.
Philippine Cordilleras
For 2,000 years, the high rice fields of the Philippines have shaped the landscape of the Cordilleras on the island of Luzon. But they are more susceptible than ever before to mudslides, as extreme rain events become more frequent across Southeast Asia.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2020%2F03%2F25%2Fworld%2Fgreat-barrier-reef-bleaching-2020-climate-change-trnd%2Findex.html" target="_blank">Great Barrier Reef</a><br />Covering nearly 133,000 square miles, the Great Barrier Reef is the world's largest coral reef and is home to more than 1,500 species of fish, 411 species of hard corals and dozens of other species. But as ocean temperatures warm because of the climate crisis, the reef is bleaching -- and scientists worry it may never recover. Earlier this year, it experienced its third mass bleaching event in just the past five years.
Great Barrier Reef
Covering nearly 133,000 square miles, the Great Barrier Reef is the world's largest coral reef and is home to more than 1,500 species of fish, 411 species of hard corals and dozens of other species. But as ocean temperatures warm because of the climate crisis, the reef is bleaching -- and scientists worry it may never recover. Earlier this year, it experienced its third mass bleaching event in just the past five years.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2019%2F03%2F21%2Fasia%2Feverest-glacier-dead-bodies-scli-intl%2Findex.html" target="_blank">Mount Everest </a><br />Even the tallest peak on Earth isn't immune to the climate crisis. Melting due to warmer temperatures has led to <a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2020%2F01%2F10%2Fasia%2Fplants-everest-climate-intl-scli-scn%2Findex.html" target="_blank">increased vegetation</a> across all elevations, scientists have found.
Mount Everest
Even the tallest peak on Earth isn't immune to the climate crisis. Melting due to warmer temperatures has led to increased vegetation across all elevations, scientists have found.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2020%2F01%2F10%2Fworld%2Famazon-rainforest-wildfires-climate-change-study%2Findex.html" target="_blank">The Amazon</a><br />The Amazon rainforest is one of the world's most important ecosystems. Its trees absorb excess C02 from the air and turn it into the oxygen we need to thrive. But<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2020%2F01%2F10%2Fworld%2Famazon-rainforest-wildfires-climate-change-study%2Findex.html" target="_blank"> deforestation has claimed</a> an area the size of 8.4 million soccer fields in the last decade, and it was ravaged by wildfires in 2019. A recent study found that the rainforest could begin contributing more planet-warming gases to the air than it absorbs by 2050 -- or sooner.
The Amazon
The Amazon rainforest is one of the world's most important ecosystems. Its trees absorb excess C02 from the air and turn it into the oxygen we need to thrive. But deforestation has claimed an area the size of 8.4 million soccer fields in the last decade, and it was ravaged by wildfires in 2019. A recent study found that the rainforest could begin contributing more planet-warming gases to the air than it absorbs by 2050 -- or sooner.
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<a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2019%2F09%2F09%2Fweather%2Falaska-climate-crisis-summer-weir-wxc%2Findex.html" target="_blank">Alaska</a><br />Alaska and the Arctic are warming twice as fast as the rest of the planet. This rapid warming is melting glaciers, intensifying algae blooms, killing salmon and fueling wildfires.
Alaska
Alaska and the Arctic are warming twice as fast as the rest of the planet. This rapid warming is melting glaciers, intensifying algae blooms, killing salmon and fueling wildfires.
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