Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

The ruins of a lighthouse on the island Amelia Earhart never reached.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

Established in 1853, this crumbling cemetery sits forgotten on the corner of Church and Chapel in Gold Country.

The palace of the King of Kings, burned by Alexander the Great.

A crumbling Beaux Arts monument to the Bay Area's age of rail.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

This former Mormon settlement is reemerging from the receding waters of Lake Mead.

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

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

The abandoned Japanese amusement park once loomed as a dystopian Disneyland.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

A submerged village appears when dam levels drop.

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

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

A nearly unconquerable island-fort in the Indian Ocean.