That is one high glass bridge. Having been to the Garnd Canyon I know how impressive it is near the edge, but actually standing over the edge is probably a completely different matter altogether. As I’m not a massive fan of heights, this will definitely be a thrill if I ever make it back to Arizona. The skywalk just out from the top of the canyon at approximately 4,000 feet, much much higher than even the tallest skyscraper so it really is an impressive piece of engineering.
There’s more information on the wiki page