A hidden tunnel of bones in one of Malta's oldest churches.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

Drink wine handed out through a window as part of an age-old tradition.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

The oldest operating pharmacy in the world features 800-year-old recipes.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Tiny memorials honor individual victims of the Holocaust.

A monument to the man who almost killed Hitler.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

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

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

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

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

A collection of abandoned typographic signs from Berlin and beyond.

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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A slice of central Asia in the middle of Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An eerie, derelict amusement park in Berlin.