Images: The skywalk over the Grand Canyon

The open-air skywalk extends 70 feet out from the rim of the canyon, where it's anchored deep in the rock landscape. It will be open from dawn to dusk, and the price of admission is $25 per person. (No word on whether that price includes an airsick bag.) As many as 120 people will be allowed on the bridge at any given time; each will have to wear special shoe covers to prevent slipping and scratching.

Photo by Robyn Beck/AFP/Getty Images