A layered tribute to the work of mosaicist Isaiah Zagar.

In the early 1800s, surgery was also a show.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

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

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

Mysterious rocks that ring musically when struck.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A park full of outsider art, created by college students studying outsider art.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

Pennsylvania's own Roswell-style UFO mystery.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

An abandoned stretch of highway, deteriorating next to the operational one.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.