A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This museum promotes informed contraception by documenting its often secret past.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Handsomely crafted representations of our round planet.

Dine amidst exotic plants at this former royal greenhouse.

The beautiful baroque library of the Hapsburg empire.

Designed as a reminder of one of the darkest moments in Austrian history.

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

Baroque celebration of the end of the Great Plague of Vienna.

This museum is dedicated to the little known ancient Roman history of Vienna.

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

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

A Jenga-style cylindrical tower of books that appears to go on forever.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

A giant interactive periodic table with real samples of the elements.

A mocking tribute to the past and modern leadership of Prague.

Monument to a suicide protesting the Soviet invasion.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This artificial cave looks like something out of a fairytale.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.