Now abandoned, the world's first torpedo factory is crumbling into the sea.

Where the lovelorn find a home for their sentimental keepsakes.

A miniature train-ride through Slovenia's largest cave system.

The "dragon babies" of southeastern Europe.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

This lurid German fountain plots the sad course of marriage from dating to death.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Cold war icon and onetime "hole" in the iron curtain.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Tiny memorials honor individual victims of the Holocaust.

A rare example of World War I trenches from the British front.

A moving memorial to the fallen and missing from WWI trenches.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

The vast, legendary catacombs hold secrets much stranger than stacked bones.