This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Monasteries on rock pillars, once accessible only by frayed ropes.

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

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

A bronze sculpture of Lenin’s likeness outside Havana surrounded by 12 human figures in solidarity with the Bolshevik Revolution.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Twelve natural mummies are displayed in the crypt of this former monastery school.

Frida Kahlo's childhood home, now a museum of her life and works.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

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

An Art Nouveau building covered in animal gargoyles and grotesques.

The deepest metro station in the world.

One of the world’s best microminiaturist, Nicolaï Siadristy displays his lifetime of tiny creations in this museum.

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

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

A self-funded cemetery with a long list of inhabitants.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Hungarian mummies in beautiful painted coffins.

Budapest's Communist-era statues, banished to the suburbs.