A completely round house designed for the Atomic Age.

Destructive children, start your engines.

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

Whimsical artist house in the New Jersey woods.

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

This former outpost was designed to protect the lucrative fur trade of the 18th century.

A sculpture of a flying hawk made from colorful car doors.

A blacklight journey through a celestial art exhibit.

A cave's rare beauty held a cavernous secret hidden underground.

This is one really big nut.

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.

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

One of two giant blue cockerel statues erected with an intentional double meaning.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The only arched bridge made of stone on the entire Mississippi River.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.