Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

A shrine of fire worship built on top of a natural flame.

Mysterious hillside with a continuously burning natural fire.

A solemn, monumental, kitschy palace of worship honoring victory in the Great Patriotic War.

Stalinist skyscraper built with help of cryotechnology.

A 360 degree battlefield experience.

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

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

Former headquarters of the KGB.

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.

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

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

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

A statue dedicated to the founders of communism.

Once the tallest building in Chisinau, this unique tower is a relic of Soviet architecture.

At less than four inches in height, this iconic fictional character is the smallest public statue in all of Moldova.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

This museum offers a journey back to the Belle Epoque era of Romania.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.