In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

See massive fossils that are over 200 million years old in northeastern Arizona.

A reproduction of earth's many biomes.

This lab's maddening silence is good for business but bad for sanity.

San Francisco's newly reopened hands-on science museum.

Tour the sci-fi-esque reality of governmental disease management.

Quite simply the largest tree in the world (by volume).

A museum dedicated to the alleged Roswell Incident.

The curiosities and wonders of pharmacy in a delightful historic building.

A monument to the art of slicing people open.

New York City's smallest piece of private property.

One part antique store, one part curiosities hodge-podge.

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

An acoustic anomaly with a mysterious cause.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A modernist landscape of water and sci-fi concrete.

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

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

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

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

A strange house built only at night, with rumored mystic inspiration.

This little museum is built on a theater that was once a wildly elaborate speakeasy.