This enormous abandoned prison was once dubbed the "Bastille of Romania."

This Transylvanian church has changed its denomination four times.

Romania's triumphal arch looks out over Bucharest.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Moss and stone turn this waterfall into an otherworldly liquid veil.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

A small town Romanian cemetery filled with darkly humorous gravestones.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

Hungarian self-built castle.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

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.

Machismo turned on its head: the lady's hand goes to the dude with the bigger brain.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

One of the most controversial statues in Romania is an emperor with no clothes.

A stunning 18th century pharmacy and medieval chemist's collection.

A tribute to a Ukrainian heroine who went undercover and killed several Nazi operatives.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.