This unique landscape is the only place in the world to dig for hourglass-selenite crystals.

What was once a summer home next to a waterfall has now become littered with graffiti and children in swimsuits.

This unusually circular centenarian barn became a Route 66 icon.

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

Celebrate the history of the rich and truly misunderstood relationship between man and pigeon.

A peculiar forest that was handcrafted for government experiments.

These massive mitts are made of 30 tons of devotional bronze.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

This amazingly preserved Gold Rush town is a historian's dream.

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

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

A miraculous natural phenomenon known as "the spring that breathes."

The first declared National Monument in the United States.

An abandoned fish-shaped drive-in gets a second life as a restaurant.

17,400 lbs., 12 feet in diameter, and 29 years in the making.

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

An unusual assortment of art, furniture, and other curiosities.

Half of a waterfall goes into the river while the other half seems to disappear.

Explore a real 19th-century lead and zinc mine at this immersive series of exhibits.