The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

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

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

A former ironworks that was the first UNESCO industrial site.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

An abandoned swimming pool decays on the outskirts of Berlin.

Terrifying derelict military hospital once housed a recuperating Hitler.

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

Floating swimming pool within a moored vessel.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Small Island off the coast of Greenland.

A surprisingly beautiful abandoned World War II military base in East Greenland.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The world's first combination ski slope and power plant.

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

A natural wonder in south Denmark.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The decaying remains of a once-luxurious Soviet spa town.

Underground monastery and fortress.