Switzerland's remote Solvay Hut looks incredibly dangerous, but it's saved the lives of many mountain climbers since it was built in 1915.
We present more high-altitude insanity from death-defying Russian climbers, who recently scaled the terrifying heights of the Shanghai Tower. Watch the clip!
Still battling that fear of heights? Brace yourself for another harrowing high-altitude clip, this time showing a pair of competing wall-climbers without safety gear. Be sure to watch to the end!
Scared of heights? You will be after watching this heart-stopping clip of record-breaker Alex Honnold free-climbing a mountain in Mexico.
Balancing over a several-hundred-foot drop may not be the safest way to confront your fear of heights... in fact, watching this scary clip might make it worse!
China's “Heavenly Stairs” lead to the scariest pathway ever built... so why do so many people risk their lives to climb them? Read on to find out... but if you're afraid of heights, you'd better hang on to something first.