An underground city of salt.

One of the last examples of Soviet architectural propaganda has a few technological tricks up its sleeve.

Gargantuan home of Russian science.

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

Dozens of padlock-trees along the Moscow River.

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

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

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

Moscow's imposing monument to the Space Age.

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.

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

The deepest metro station in the world.

This derelict superstructure was a very important warning system for the Soviet military.

340-foot statue built to honour the Heroes of the Soviet Union.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This attraction was abandoned after the Chernobyl disaster.