This stunning limestone waterfall is the highest in Estonia.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.

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

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

No one knows the origin of this creepy little stone man with an oversized phallus.

The largest fountain in Bratislava.

Home to three historic ships from the age of Vikings.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

This handsomely carved wooden church is more than 800 years old.

A crumbling bakery where forced laborers from the nearby concentration camp toiled to feed their fellow prisoners and Nazi soldiers.

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

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

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

A pair of giant stone heads represent the ancient Roman saints beheaded here.

An eerie, derelict amusement park in Berlin.

Volkswagen's dedicated museum dives into the complex history of one of the world's best known cars.

This abandoned hospital has a long history, having housed both German and Soviet soldiers in the course of its life.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

This ornate Weser Renaissance house was also the home of an infamous witch hunter.

One of the largest busts in the world celebrates the German city's erstwhile namesake.

Several of these strange cone-shaped bunkers can still be seen around the former Nazi headquarters.