The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

UNESCO-protected ancient burial ground.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

This historic black and white monastery is one of Bulgaria's architectural jewels.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

Hungarian self-built castle.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

Electrical curiosity museum housed in an old transformer station.

Hungarian mummies in beautiful painted coffins.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

An industrial site turned into Hungary's most cherished natural wonder.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

A forgotten graveyard lost in the tangles of an overgrown garden.

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

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

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

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A small town Romanian cemetery filled with darkly humorous gravestones.