This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

This small-town pizzeria won the Hollywood lottery.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

An icon among Florida's pre-Disney tourist attractions, just west of Orlando.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

A vast array of tropical plants collected by a vacationing couple.

One of the world's largest model railroads is a mind-boggling achievement.

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

The site of one of history's most indelible and horrific tragedies.

Mysterious rocks that ring musically when struck.

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

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

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

The world’s first penitentiary, meant to be humane, drove men insane.

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A layered tribute to the work of mosaicist Isaiah Zagar.