Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A hospital closed seemingly in the middle of operations, leaving behind fodder for horror films and ghost hunters.

A museum befitting the city responsible for supplying the majority of the world's LSD.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Shop selling 500 flavors of soda has something for everyone.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

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

A beautiful oddities shop crammed with strange and morbid curiosities.

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

Where hikers on the Tecumseh Trail can exchange a dirty sock for a free geode.

You thought Santa Claus didn't exist, but it turns out you were wrong.

This former office building has been transformed into an immersive music venue and art space.

The longest navigable underground river in the United States is home to countless blind and albino animals.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

Nature and beauty amidst pollution and industrial wreckage.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.