This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Rippling sand dunes frozen in the Arizona rock.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

A quirky old tree covered in tokens, cans, and bottles of wishes.

A sculpture for the sun and stars, created by Nancy Holt.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

Pyramid home to an obscure religious group that practices modern mummification.

Incredible sculptures inspired by obscure passages from the Bible.