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.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A two-way chairlift system between Zugliget and the highest point in the city.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A fake Transylvanian castle houses a cathedral of antlers.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

This hidden art nouveau gem was designed by an architect in search of a national style.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The largest collection of death masks in Ukraine.

A collection of miniature, symbolic sculptures hides in plain sight across Kyiv.

Kyiv's answer to Muscle Beach is a Soviet-era gym made from scrap metal.