This Ukraine alleyway has become its own little island of forgotten things.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

17th century palace once a meeting place for politicians.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

An abandoned saucer-shaped monument in the Bulgarian mountains.

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

Resonant stone, that has been played since prehistoric times.

A shrine of fire worship built on top of a natural flame.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

A medieval church built up to defend its village.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

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

Romania's triumphal arch looks out over Bucharest.

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

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This once-derelict building is now one of the most beautiful bookstores in the world.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.