Moscow's imposing monument to the Space Age.

Gargantuan home of Russian science.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

Some Moscow residents once claimed the bizarre, contorted mass of metal on top of the building was used to manipulate minds.

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

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

The tallest hotel in Europe.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

Stalinist skyscraper built with help of cryotechnology.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

One of the world's tallest statues is also one of its most hated.

Dozens of padlock-trees along the Moscow River.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

Home of the future Emperors of Russia.

Former headquarters of the KGB.

Museum design and public transportation meet in this unique Russian train car.

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

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

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

The Guardian of Tallinn.

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

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.