France's national museum of scientific and industrial instruments.

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

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

After fleeing the Syrian civil war, chef Malakeh Jazmati began serving exceptional renditions of her homeland's cuisine in Berlin.

Superb sweets await at the first Jewish bakery inducted into Berlin’s prestigious baker’s guild.

Cold war icon and onetime "hole" in the iron curtain.

Berlin's old airport.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

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

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

A slice of central Asia in the middle of Berlin.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

Model Trains and Much More in Hamburg.

Hamburgers are intensely proud of their tunnel beneath the river.

A unique sculpture calls the outside of this steakhouse home.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

A medieval setting reimagined into a unique art alley.

The oldest continuously operating pharmacy in Europe.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.