Red Bull athlete Alex Mason paired up with “Sketchy“ Andy Lewis to create a slacklining ladder course up Onomea Falls on the Big Island of Hawaii.

The course included over 1000 feet of slackline and about a mile of ropes and cables. The eight-line playground built around and above 120 feet of waterfalls took the two over 200 hours to make.

Check out how much fun they had playing on their course when it was done.