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

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.

Moscow's imposing monument to the Space Age.

Former headquarters of the KGB.

Back in the tiny USSR.

Museum celebrating the achievements of the Soviet space program.

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

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A fantastic Christmas tradition where defecation meets the manger.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

A stately palace has been converted into the world's largest cannabis museum.

Week-long block party becomes a competition for the best decorated street.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Mountain where Jesus was first tempted by the Devil.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

This cemetery features modernist statues as strange as its name.

This semi-secret storybook hedge maze is also the oldest garden in the city.