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

An occult-y, historic hotel with the World's Largest Ouija board on the roof.

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

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

The graffitied ruins stand hidden within the Pennsylvania woods.

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

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

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

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

This collection of odd proofs of concept is like taking a walk through the imagination of a Victorian engineer.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

The humble field where the first Major League Baseball game was played.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

A quirky collection of outsider art made from automobile parts.

A giant ball made from pieces of an old Jeep.