For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

A natural gas leak provides a flickering flame beneath a waterfall.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

One of the last Jazz Age "Wonder Theaters" in New York City.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

An abandoned castle owned and ignored by Masons carries a cursed history.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A hands-on traveling collection of the innovative devices of yesteryear.

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

The secluded beach getaway from Wes Anderson's dreamy summer romance.

An unusual library of dead things at the Rhode Island School of Design.

A virtually untouched "home on the hill" for the flora and fauna of Rhode Island.

Unicorns, elephants, and bears, oh my!

A former hospital is now home to a pizza parlor and maybe a few ghosts.

One of the best places in Florida to spot rare, carnivorous pitcher plants.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

Designed as a place for patients to take in the scenery, this tower has a dark history.

The building that inspired Shirley Jackson's "The Haunting of Hill House."

Taxonomy experiment known for quirky collections.

This charming woodland trail is peppered with poetry.