Gordon Wiltsie/National Geographic / Getty Images
Corey Rich / Getty Images
Portaledge camping at Yosemite.
MICHAEL NICHOLS/National Geographic Stock
Sitting on the Trolltunga rock in Norway.
Jumping on the Trolltunga rock in Norway.
Photo by Opple Voodda.
Solent News / Rex / Rex USA
British climber John Roberts in South Africa.
Keith Ladzinski/Barcroft Media /Landov
Ice climbing a frozen waterfall.
Extreme skiing at Grand Targhee, Wyoming.
Tree camping in Germany.
Vintage climbing photo taken from Gaston Rébuffat’s book.
Desre Tate/Barcroft Media /Landov
Extreme kayaking at Victoria Falls.
Handout / Getty Images
Blake Aldridge dives 29 meters from the rock monolith during the Red Bull Cliff Diving World Series in Portugal.
Climbing Mt. Wellington.
Photo by S. Karpiniec/Creative Commons.
On the Edgewalk in Toronto. (Courtesy of CN Tower.)
SINDRE LUNDVOLD / BARCROFT MEDIA
A death-defying act by Eskil Rønningsbakken in Norway.
How mountain climbers sleep.
Alex Honnold at Yosemite.
Shot taken from a documentary entitled Alone on the Wall about Honnold’s adventures.
Now imagine if you dropped your phone down there.
Photo by Copaintok74/Creative Commons.
JIMMY CHIN AND LYNSEY DYER / NAT GEO STOCK / CATERS
Base jumping in Yosemite.
JEFF CURTES / CATERS NEWS
SHAMS /BARCROFT MEDIA/Barcroft Media /Landov
Hanging out at the Sky Walk in Macau.
Photo by toon_ee
Jared Alden / Getty Images
A ride at the Stratosphere Tower in Las Vegas.
Dinner in the sky in Brussels.
Bike trail on the Cliffs of Moher, via Hans Rey.
2001 LimeWave – Anki Knutsson & Lars Andersson
Driving down a sand dune in Lucky Bay, Australia.
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