This museum glorifies the humble potato.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

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

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

More than 21,000 images fill this overlooked gem of a prehistoric site.

This is one really big nut.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

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

Once a dining hall for boarding school students, this lodge was a popular haunt for nuclear physicists working on the Manhattan Project.

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

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.

These aggressively sustainable art homes look like something out of 1970's science fiction.

When ecosystems collide in the arid Southwest.

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

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A motel dedicated to Southwestern nostalgia.

This sanguine boulevard was named after a deadly cowboy bar fight.

Britain's tallest megalith towers over the cemetery of a quiet English village.

A neolithic dolmen that was rebuilt after collapsing during the 19th century.

Perhaps the only prehistoric monument with its very own public bus stop.

A circle stone within a stone circle.

A open air theatre built on a cliff by an eccentric British woman.