It's 10-feet wide and extends 70-feet from where it's anchored to the rock. It has a deck made of tempered glass. That's a description of a new $30 million structure being built in the Grand Canyon that's expected to draw thousands... The Hualapai Indian Tribe's "Glass Walkway," a structure that will be suspended over the edge of the canyon some 4,000 feet above the Colorado River. It will be higher than any of the world's tallest free-standing skyscrapers. The walk way is horseshoe shaped, and its glass bottom will allow you to look straight down between to the canyon floor....