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

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

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

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

The hallowed remains of a 900-year old Ancestral Pueblo great house.

The oldest continuously occupied public building in the United States.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

A natural formation that resembles a camel resting in the New Mexico desert.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

This popular pilgrimage site offers a hole filled with holy healing dirt.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

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

A multi-storied adobe complex has been inhabited for more than a thousand years.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

The only one of New Hampshire's original 14 World War II watchtowers to survive in near-original condition.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

Elaborate hand-carved wooden clocks two brothers made in their spare time are on display at this handsome little museum.

The oldest university museum west of the Mississippi retains its 19th century feel.