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

Dozens of padlock-trees along the Moscow River.

The tallest hotel in Europe.

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

Moscow's imposing monument to the Space Age.

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.

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

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

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

Gargantuan home of Russian science.

Stalinist skyscraper built with help of cryotechnology.

Home of the future Emperors of Russia.

Former headquarters of the KGB.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

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

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chornobyl disaster.

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

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.