This natural "sea of stones" was once used by the Romans as a quarry.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

The figure atop this globe is from a Serbian play about a merchant's travels around the world.

The abandoned military base looks like a post-apocalyptic wasteland.

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

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

The temple that withstood the Nazis.

This narrow fjord-like bay is the largest ria in the Mediterranean Sea.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A field filled with carved medieval tombstones called stećak.

A 16th-century mosque rebuilt after wartime devastation.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

Climb into Albania's communist history while enjoying a spectacular ocean view.

This ancient structure appears Roman, but was constructed during the 16th century and was utilized until 1911.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

Monasteries on rock pillars, once accessible only by frayed ropes.