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

The Latvian city of Ventspils is filled with dozens of cow statues showcasing unique themes.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

Rent a barrel for a personal view of where the Baltic Sea meets the Gulf of Riga.

This fortress was designed to prevent a Nazi invasion but was never used.

Each spring, residents of this Czech town hoist a 'slain' metal dragon onto the city hall to commemorate a local medieval legend

This fairytale medieval church in Poland originally spent centuries in Norway.

Enormous sandstone towers loom within a Czech forest.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

On this Polish road, an optical illusion makes cars seem to roll uphill.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

The Habsburgs' royal collections of art and wonders.

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

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

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

This museum is home to a sugar sculpture of the Berlin Airlift Memorial.

An eerie, derelict amusement park in Berlin.

The world's most delightful not-NOT-religion welcomes visitors to the town of Templin, just like its more stoic peers.

A quaint Russian village in the middle of a German metropolis.

This historic little railroad runs through some of the most beautiful scenery in Germany.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

The largest brick bridge in the world.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.