Do look down!

Sight-seers may not be able to walk on air over the Grand Canyon, but now they can walk on glass.

The Grand Canyon Skywalk will allow visitors to literally walk out over the Grand Canyon and look down at the river below. The Skywalk will be located at Grand Canyon West’s Eagle Point.
This open-air, horse-shoe shaped structure has a floor of tempered glass. The walkway extends 70 feet out over the canyon, and hovers at an elevation of 4,000 feet – more than four times the height of the Eiffel Tower.

March 28, 2007 will mark the official opening of the Skywalk. A three-floor visitors center, complete with museum, movie theater and events facilities, will open soon afterwards.