Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

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

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

The only Florida state park with publicly accessible caves.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

This grave marks the final resting place of pioneer John Chapman, better known as Johnny Appleseed.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

The oldest continuously occupied public building in the United States.

A frozen oasis lies beneath the scorching New Mexico desert.

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

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

An unusual geological feature towers over the remains of a dark episode in United States history.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Couple's personal collection of pinball machines turned public pinball museum.

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

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

A lively annual event in which thousands of people race to push coffins heavy with bodies up a hill.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.