The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.