The "glass bridge" is a modern-day marvel of civil engineering. The cantilevered walkway extends 70 feet past the edge and suspends guests 4,000 feet above the Colorado River. The bridge is strong and can hold up to 71 fully loaded 747 jumbo jets. It can also withstand earthquakes up to magnitude 8 on the Richter Scale. Built to support up to 800 people, the Skywalk's maximum occupancy is 120.Civil...
