The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A graveyard and memorial chapel for victims of leprosy.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

A meteorite-bounded town in Bavaria.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

Enter the cabin of a life-sized Hindenburg replica.

An elevator into the Baltic Sea.

The first (but not only) upside-down house in Germany.

This 1960's Soviet submarine in Peenemünde Harbor claims to be the largest submarine museum in the world.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

This towering statue of Jesus provided internet to the surrounding area.

The site of one of the largest prison escapes of World War II.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Berlin's old airport.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Terrifying derelict military hospital once housed a recuperating Hitler.

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

These waste baskets play a few risque messages to discourage littering.

Swedish skyscraper with a 90° twist.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.