A hidden three-foot-wide house separates these two regal churches.

The world's largest model of our planetary system.

A Milanese café entirely designed by the American director Wes Anderson.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

When in Idaho, sleep in a giant potato.

Experience the glam side of air travel without leaving the ground at this speakeasy.

This shop filled with oddities and knick-knacks is named for a 19th-century charlatan.

A museum preserving one company’s history of preserving food.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

A museum of unusual collections, mini-towns, and a half-dog, half-alligator.

A bizarre house filled with an astounding array of collections.

This tiny museum's sizable collection is jammed into a former underground public toilet.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

This "castle" is actually a limestone and quartz formation hidden along a trail.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.