Augrabies Falls waterfall on the Orange River, Northern Cape, South Africa, Africa

Waiau Falls, Waikato, Coromandel Peninsula, North Island, New Zealand, Pacific

The Upper Falls in the Grand Canyon of Yellowstone in the Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Staff from the Lindblad Expeditions ship National Geographic Sea Bird kayaking in Southeast Alaska, USA.

Hiker in blue jacket navigating rocky landscape near a small waterfall on mount txindoki, showcasing the rugged beauty of gipuzkoa, basque country

A man ice climbing a frozen waterfall through a sandstone arch in Utah.

Hikers swim in the pool below 180-foot Deer Creek Falls in the Grand Canyon outside of Fredonia, Arizona November 2011. The 21.4-mile loop starts at the Bill Hall trailhead on the North Rim and descends 2000-feet in 2.5-miles through Coconino Sandstone to the level Esplanada then descends further into the lower canyon through a break in the 400-foot-tall Redwall to access Surprise Valley. Hikers connect Thunder River and Tapeats Creek to a route along the Colorado River and climb out Deer Creek.

An unidentified lead ice climber tops out on frozen waterfall by a popular climbing area called Haffner Creek in Kootenay National Park, British Columbia on December 1, 2002 as its snows, Canada

Hikers setup camp on a beach along the Colorado River near the plumeting 180-foot Deer Creek Falls in the Grand Canyon outside of Fredonia, Arizona November 2011. The 21.4-mile loop starts at the Bill Hall trailhead on the North Rim and descends 2000-feet in 2.5-miles through Coconino Sandstone to the level Esplanada then descends further into the lower canyon through a break in the 400-foot-tall Redwall to access Surprise Valley. Hikers connect Thunder River and Tapeats Creek to a route along the Colorado River and climb out Deer Creek.

Man rappelling down canyon through waterfall in Utah.

The Underworld - Photographs from a very famous European cave called The Gouffre Berger, in France

A man ice climbing a frozen waterfall through a sandstone arch in Utah.

A man hiking below Treasure Falls, San Juan National Forest, Pagosa Springs, Colorado.

Hikers past small waterfalls along Deer Creek Narrows in the Grand Canyon outside of Fredonia, Arizona November 2011. The 21.4-mile loop starts at the Bill Hall trailhead on the North Rim and descends 2000-feet in 2.5-miles through Coconino Sandstone to the level Esplanada then descends further into the lower canyon through a break in the 400-foot-tall Redwall to access Surprise Valley. Hikers connect Thunder River and Tapeats Creek to a route along the Colorado River and climb out Deer Creek.

A man hiking below Treasure Falls, San Juan National Forest, Pagosa Springs, Colorado.

The Eagle Creek Alternative Trail, to the Pacific Crest Trail along the Columbia River Gorge

A woman running along trail blasted into a hill behind a waterfall on the Pacific Crest Trail, Oregon.

Multnomah Falls area, Columbia River Gorge, Oregon

A cave explorer reaches the top of a waterfall underground in New Britain

A Male Hiker Is Soaking Wet After Traversing A River With A Waterfall In The Val Danniviers

A young man holds onto a rope above a river in a cave in China.

Hiker Walking Under The Kaaterskill Waterfalls, New York, Usa

Couple hiking in the mist below Nevada Falls. Photo by Thomas Kranzle, United States of America

Middle North Falls, Silver Falls State Park, Oregon, Usa, Hiker

Person Viewing Athabasca Falls In The Early Morning

A young couple standing in front of a waterfall on private land on the island of Kauai, Kauai, Hawaii, United States of America

Rear view of hiker crossing footbridge over creek in Fiordland National Park

Man holding empty water bottles

Russia, Karachay-Cherkessia, Arkhyz, Man standing near Sofiyskiye Vodopady waterfall in Caucasus Mountains

Russia, Karachay-Cherkessia, Arkhyz, Man standing near Sofiyskiye Vodopady waterfall in Caucasus Mountains

Man holding empty water bottles

Man with recycling bin

Young man proposing to his girlfriend while hiking by Haifoss waterfall in Iceland

Russia, Karachay-Cherkessia, Arkhyz, Man standing near Sofiyskiye Vodopady waterfall in Caucasus Mountains

Russia, Karachay-Cherkessia, Arkhyz, Man standing near Sofiyskiye Vodopady waterfall in Caucasus Mountains

Hiker with backpack on cliff by Haifoss waterfall in Iceland

Hiker by Haifoss waterfall in Iceland

Hiker with backpack on cliff by Haifoss waterfall in Iceland

Hiker by Haifoss waterfall in Iceland

Hikers in front of waterfall

Portrait of mid adult couple, sitting together on rock in waterfall, New River Gorge National River, Fayetteville, West Virginia, USA

Hiker by Haifoss waterfall in Iceland

Hiker sitting on cliff by Haifoss waterfall in Iceland

Hiker

Hikers in front of waterfall

Hiker by Haifoss waterfall in Iceland

Hiker sitting on cliff by Haifoss waterfall in Iceland

Hiker with backpack on cliff by Haifoss waterfall in Iceland

Young man resting in hammock by waterfall

Hiker couple sitting on cliff by Haifoss waterfall in Iceland

Hiker looking at waterfall

Hiker couple sitting on cliff by Haifoss waterfall in Iceland

Hiker by Haifoss waterfall in Iceland

Hiker with backpack on cliff by Haifoss waterfall in Iceland

New Zealand, Taranaki, Egmont National Park, Hiker walking down wooden stairs towards waterfall

Couple taking picture in front of waterfall

New Zealand, Taranaki, Egmont National Park, Hiker walking down wooden stairs towards waterfall

Hiker with binoculars

Hikers in front of waterfall