Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This tiny structure was built by the creator of the Brooklyn Bridge.

This colonial mansion has been home to a staggering number of American historic figures.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

Century-old shop, specializing in Occult products.

The abandoned coal loading dock is a canvas for unsanctioned art.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

An Irish Memorial commemorating those who perished due to potato blight.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The first American department store, and home to the largest operating musical instrument in the world.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Huge masonic hall in Philadelphia with lavishly themed rooms.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.