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

Berlin's old airport.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

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

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Legend says this sacred tree was a gift from goddess Athena.

A sharp sculpture made of thousands of pieces of jagged glass.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This artistic fountain display pays homage to this area's theatrical history.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A diminutive statue that was inspired by the sculptor's own daughter.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A medieval setting reimagined into a unique art alley.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

Ancient serpentine sacrifice holder that has stood the test of time.