A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This historic national park is covered in the stunning ruins of red rock pueblos.

An excursion train traverses a picturesque red-rock canyon along the Verde River.

A Wild West jailhouse that slid down the mountainside.

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

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

Legends surround this jagged rock formation in the New Mexico desert.

Drink a Guinness under the wings of Reagan's retired Air Force One in his presidential library.

A relic from a forgotten bakery chain still spins atop a diner.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

Picnic on the seashore in the footsteps of ancient kings, protected by giant mythical cat beasts.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A UFO scrapyard in the California desert.

This historic tower in the California desert promises visitors a "vortex of good vibes".

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Explore more than 130,000 new and used books in the "world's largest outdoor bookstore."

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.