The Grand Canyon Skywalk is a glass bridge suspended 4,000 feet above the Colorado River at the edge of the Grand Canyon. Construction began in 2004 and was completed in 2005, passing tests by withstanding over 71 million pounds, the weight of 71 fully loaded 747 airplanes. The bridge can withstand winds over 100 mph from all directions and an 8.0 magnitude earthquake within 50 miles, using over 1 million pounds of steel in its construction.

1. The Grand Canyon Skywalk The glass bridge which is suspended 4,000 feet above the Colorado River on the very edge of the Grand Canyon. The construction began in March of 2004. On May 2005, the final test was conducted and the structure passed engineering requirements by 400 percent, enabling it to withstand the weight of 71 fully loaded Boeing 747 airplanes (more than 71 million pounds.) The bridge is able to sustain winds in excess of 100 miles per hour from 8 different directions, as well as an 8.0 magnitude earthquake within 50 miles. More than one million pounds of steel has gone into the construction of the Grand Canyon Skywalk.

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