A museum dedicated to the alleged Roswell Incident.

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

This is one really big nut.

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

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

The only diamond mine in the world where you can keep what you find.

The wood bears a hidden love note carved by a young Johnny Cash.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

A cosmic pit stop just beyond the notorious Area 51.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Two geoglyphs that are truly unique to North America.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

A toxic ghost town sitting atop a massive coal fire.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

The largest earthwork effigy in the world.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

A fake town founded by Western movie stars is now becoming a hip desert community.

A music-filled, booze-soaked oasis in the desert.

An eerie natural formation that looks right back at you.