This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A beautifully eclectic mix of architectural styles.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

Moscow's imposing monument to the Space Age.

Stalinist skyscraper built with help of cryotechnology.

Gargantuan home of Russian science.

The tallest hotel in Europe.

World's largest bell sits on the grounds of the Kremlin in Moscow.

This massive monument honors the first human in space.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

This 400-year-old tree is actually an immigrant from North America.

The French leader's hat sits in a glass case at the oldest restaurant in Paris.

The site where two doves fell in love.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

One of Jeff Koons’s largest sculptures and his first commemorative work.

Marvel at the opulent Art Nouveau interior while dining on dirt-cheap French classics.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

This demon atop the Notre-Dame de Paris looks utterly bored.

This bridge was constructed from the rubble of the infamous Bastille.

The first green space constructed on an elevated viaduct.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.