Grand Canyon Skywalk (Arizona – USA)

Horseshoe-shaped platform is stressful depends exactly 4000 feet above the ground and extends 65 feet from the edge of the cliff the Grand Canyon. Skywalk is a horseshoe-shaped glass wall constructed of 4 inch thick and visitors were required to wear socks, anti-scratch if you want to go and see the sights there. This work is a remarkable architectural masterpiece that could hold the weight to 70 tons (equivalent to 14 African elephants) and can withstand winds up to 100 meters per hour.