Image by Gordon Wiltsie/National Geographic / Getty Images
|Skywalking in the Alps.|
Photo by Josef Stuefer
|Portaledge camping at Yosemite.|
Image by Corey Rich / Getty Images
Image by MICHAEL NICHOLS/National Geographic Stock
|Sitting on the Trolltunga rock in Norway.|
|Jumping on the Trolltunga rock in Norway.|
Photo by Opple Voodda.
|British climber John Roberts in South Africa.|
Image by Solent News/Rex/Rex USA
|Ice climbing a frozen waterfall.|
Image by Keith Ladzinski/Barcroft Media /Landov
|On the Kjeragbolten boulder in Norway.|
Photos via Nilsenbilder and Simon Taylor
|Extreme skiing at Grand Targhee, Wyoming.|
|Skywalking on Mount Nimbus in Canada. |
Photo by CMH Summer Adventures.
|Tree camping in Germany.|
|Vintage climbing photo taken from Gaston Rébuffat's book.|
|Extreme kayaking at Victoria Falls.|
Image by Desre Tate/Barcroft Media /Landov
|Blake Aldridge dives 29 meters from the rock monolith during the Red Bull Cliff Diving World Series in Portugal.|
Image by Handout / Getty Images
|Climbing Mt. Wellington.|
Photo by S. Karpiniec/Creative Commons.
|On the Edgewalk in Toronto. (Courtesy of CN Tower.)|
|A death-defying act by Eskil Rønningsbakken in Norway.|
Image by SINDRE LUNDVOLD / BARCROFT MEDIA
|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.
|Base jumping in Yosemite.|
Image by JIMMY CHIN AND LYNSEY DYER / NAT GEO STOCK / CATERS
Image by JEFF CURTES / CATERS NEWS
Image by SHAMS /BARCROFT MEDIA/Barcroft Media /Landov
|Hanging out at the Sky Walk in Macau.|
Photo by toon_ee
Image by Jared Alden / Getty Images
|A ride at the Stratosphere Tower in Las Vegas.|
|In Ft. Tryon park.|
By Jordan Matters, from the book Dancers Among Us.
|Dinner in the sky in Brussels.|
|Bike trail on the Cliffs of Moher, via Hans Rey.|
|Driving down a sand dune in Lucky Bay, Australia.|
Image by 2001 LimeWave - Anki Knutsson & Lars Andersson