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

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

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

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

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

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

This watchtower once presided over the Berlin Wall.

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

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

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

One of downtown Berlin's last reminders of its Communist past.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

According to legend, this rock represents a young girl trapped by an evil ocean spirit.

This bronze boy sits on one of Capri's rocky cliffs, waving at the passing boats.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The beautiful baroque library of the Hapsburg empire.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.