Watch This Daring Highwire Walk Through a Deep Underground Cave
Nov. 16, 2016 - In a cave deep beneath the French Alps, German wire walker Lukas Irmler this summer led a team of French cavers and slackliners to an otherworldly site around 500 yards underground. Slacklining, the sport of balancing on an elastic wire, is more commonly practiced above ground—often at high altitudes, where it’s called highlining. The practitioners of the spelunking variant are calling it “deeplining.” The team believes that their expedition, sponsored by outdoor equipment maker Petzl, has set a world record for deepest slacklining.
