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

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

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

A quirky collection of outsider art made from automobile parts.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

This public space is speckled with the eerie remnants of a defunct amusement park.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

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

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

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

A local prank turned town icon.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

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

Pennsylvanian mass grave and possibly mass murder.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

The oldest farmer's market in America is so ancient it was approved by the King of England.

A failed piece of Orientalism has become the proud symbol of a community.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

In which a local geological marvel becomes a quaint roadside attraction.