Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

A mysterious castle built as a monument to lost love.

A notorious punk house turned co-op.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A living archive of urban activism and space reclaimed.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Try not to get slimed in Tribeca.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

An avant garde art museum at the University of Chicago.

In the midst of a residential town in Washington exists a property saturated with one man's artistic creations.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This scenic gorge is named after one of the most famous Bigfoot attacks in pseudohistory.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

9,000 square feet of vintage and modern mechanical toys, dioramas & sideshow curiosities.

Home to the deepest rift anywhere on Earth.

This quaint archive of the silent era preserves and pays homage to a seminal moment in film history.

London's largest outsider art museum.