Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

An alternate history park where the Union Army loses the war... to dinosaurs.

This steamer is known as "The ship that built Cleveland."

An abandoned concrete jungle surrounded by a lush park.

Ship skeletons haunt Baltimore's waterways.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

One of the largest fleets of armored vehicles in the world, sitting out in the California desert.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

A former barn converted into a massive train diorama.

A historic coal mine that doubles as a museum and tourist attraction.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

A tribute to a 13-year-old boy who was kidnapped in 1793 and escaped over two years later.

Where the writer penned his famous story about a jumping frog.

Vintage cars and motorcycles race for glory in a throwback motorsport celebration on the Jersey shore.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

The Cadillac Ranch for monster truck aficionados.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

A World War II-era submarine is stuck in the mud in New Jersey.

An architect's childhood fantasy treehouse made real.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

The show's fictional Korean medical camp was created in the Santa Monica hills.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.