An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

An unsettling painting of three faceless sisters that is surrounded by history and legend.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

The ruins of a military-industrial complex now host concerts and more.

An eerie gravel road full of shards of red bricks leads to the ruins of a deserted factory.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

A Nazi concentration camp and Anne Frank's place of death.

340-foot statue built to honour the Heroes of the Soviet Union.

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

This derelict superstructure was a very important warning system for the Soviet military.

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

An abandoned train station in Munich constructed for the 1972 Olympic games.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

This watchtower once presided over the Berlin Wall.

A towering monument to war, located on a beautifully peaceful hill.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

When German-Iraqi relations broke down, this embassy was vacated post haste.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

Berlin's old airport.