A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

Nature is leading a successful mutiny on this century-old freighter.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

America's post-nuclear-attack chambers of Congress.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Site of the world's largest nuclear explosion.

The secret city built by the Manhattan Project.

The remains of one of America's first radiation testing grounds still rest ominously in a Georgia forest.

An enormous concrete structure built over a nuclear crater.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

The birthplace of both the Atomic Age and Godzilla, and the namesake of the bathing suit.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This relatively recently abandoned brewery is a tragic reminder of the continuing effects of Hurricane Katrina.

Once swallowed by flood waters, this village has emerged as an eerie shadow of its former self.

This historic railway museum may have lost its passengers but not its love for trains.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.