These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

A rare view of a preserved Victorian science museum.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Where America's first doomsday cult awaited the end of the world.

A layered tribute to the work of mosaicist Isaiah Zagar.

A toxic ghost town sitting atop a massive coal fire.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Astounding collection of coin-operated games and automata.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

This innocent-looking townhome is actually a subway exit.

The last slot car racing arcade in Brooklyn is keeping the dream of speedy little autos alive.

A living archive of urban activism and space reclaimed.

Detailed facade of a brownstone in Boerum Hill.

Slyly buy a shake in the Parker Meridien lobby.

This semi-hidden Manhattan restaurant is based out of a loading dock.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.