The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

The "dragon babies" of southeastern Europe.

A whimsical bridge adorned with decorative dragons.

A miniature train-ride through Slovenia's largest cave system.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This one-time health resort was used by aristocrats around the world.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

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

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

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

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

Former headquarters of the KGB.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

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

The "Mystery and Company of Merchant Adventurers" is an Elizabethan-era hangout in Moscow.

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

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

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

An enormous pair of straw sandals woven in the traditional way—to keep demons at bay.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

These upturned herring boats make nifty storage sheds for fishing goods.

This five-star hotel was originally a swanky parking garage.