After several weeks of radio silence, this abandoned oil tanker washed up on a remote beach in Liberia.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

It was meant to help transport wounded soldiers to a secret underground hospital.

This Latvian shot factory is still used twice a year to manufacture bullets the old-fashioned way.

Considered one of the most haunted places in Europe, this 800-year-old castle was home to noble prisoners.

A few crumbling buildings and the occasional pipe sticking out of the ground are all that remains of the largest refugee camp in Sweden during World War II.

This secret facility trained seals for the Swedish navy during the Second World War.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

Pictures tacked onto trees remember the more than 40,000 of Stalin's victims buried here in mass graves.

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

The only things left in this abandoned Latvian graveyard are a mysterious stone and a ghost story.

Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

A floating cat sanctuary on an Amsterdam canal.

This quiet bird sanctuary on the Danish coast is home to something not usually found in a conservation area: hunters' cabins.

Sculpture garden of religious statues made it through Soviet rule.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.

These abandoned vessels are destined to be reclaimed by the forest.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

These crumbling Latvian forts make for some haunting seaside ruins.

The mile-long pier stretches from a ruined fortress out into the Baltic.