Site of the world's largest nuclear explosion.

Sulphuric gases inhabit a beautiful Japanese island.

Unrepaired walls from a 1920 anarchist bomb attack.

This large, castle-like structure is hidden amid the mountains on the grounds of the Utah State Hospital.

Memorial to the Titanic engineers that died working to hold back the sea.

A resort destroyed by a mysterious bombing offers visitors only its remains and the riddle behind it's demise.

Eyam took steps to quarantine themselves and keep the plague from spreading.

The Canaima airstrip in Venezuela keeps an antique DC 3 plane in its camp.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

When methane gas started seeping up from the ground, they picked up and moved the entire town.

This settlement on the original Transcontinental Railroad began by harvesting timber, but transitioned to a forgotten 19th-century industry: harvesting ice.

Bits and pieces from the ill-fated Donner Party's winter cabins.

Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

An abandoned castle owned and ignored by Masons carries a cursed history.

The lost town of Neversink, sunk by New York City.

An urban forest overtakes what was the greatest failure of utopic urban housing.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

This sinkhole was created by a tragic industrial accident and continues to ravage the surrounding landscape.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

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

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

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

A massive cave complex boasts some of the clearest water (and most charming bats) in the world.