A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

Check out a hidden collection of vintage neon signs.

The largest self-built castle in the U.S., six decades in the making.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

When ecosystems collide in the arid Southwest.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

The location where the iconic movie character declared it was time to go home.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

Oddly shaped rock formation, misassociated with a nearby utopian community.

This site is home to ancient petroglyphs and pictographs dating back to 6,000 B.C.

The fifth-longest natural arch in the world, and the longest outside China.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

A house carved into a rock in the 1940s.

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

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

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.

A tunnel with windows, so you don't miss out on the impressive views.

The unusual patterns in this rock formation result from two distinct modes of weathering.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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