yes
It is a great canyon, and a great whitewater site, but the Grand Canyon is a spectacular giant by comparison.
Grand Canyon National Park became a World Heritage Site in 1979.
On October 26, 1979 the Grand Canyon became a world heritage site according to the National Parks Service.
No.
Grand Canyon.
No the site you seek is Carlsbad Caverns.
Both the Painted Desert and the Grand Canyon match that description.
Here is a site that acts as a booking agent for hotels in the Grand Canyon area: http://www.grandcanyonlodges.com/
Because it is a site of great Natural beauty.
It is a UNESCO World Heritage Site.
The Grand Canyon existed millions of years before the Pyramids of Giza were built. The Pyramids were considered a "tourist" destination at least since the 300s BCE. The Grand Canyon has only been one since about 1885. So take your pick on which site is the "oldest" tourist site.
Grand Canyon.