A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

An automaton perched above an classic clock and watch store

This semi-spooky remnant of an abandoned hotel provides fantastic views.

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

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

A curious building honoring past and current members of a historic musical comedy troupe.

This icon of the Atomic Age now lays dormant.

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

Alexander Hamilton’s creation caused quite a bit of controversy.

Intricate storybook scenes are tucked inside these shadow boxes, which are tucked inside a library in the Pocono Mountains.

Where the "World Pinball Champion” is crowned.

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

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

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

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

The last street in Pittsburgh that's paved with wood.

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

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.