This irregularly shaped sea fortress has defended not one but three different sovereign states.

Flamboyant architecture from the turn of 20th century.

This unique Lady Liberty is one of the only examples of the figure sitting down.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

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

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

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

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

The deepest metro station in the world.

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

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.

Dozens of padlock-trees along the Moscow River.

Stalinist skyscraper built with help of cryotechnology.

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

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

Moscow's imposing monument to the Space Age.

Museum celebrating the achievements of the Soviet space program.

Gargantuan home of Russian science.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

Originally a meeting place for foreign correspondents and war reporters, the FCC remains an atmospheric spot for sunset drinks in Phnom Penh.

Bombed and burned, this monument represents the often controversial ties between Vietnam and Cambodia.