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

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This striking sculpture of Icarus honors Greece's fallen flyers.

Where commuters walk through remnants of an ancient Greek necropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A 11-foot former president stands on a Kosovo street that also bears his name.

A futuristic, brutalist masterpiece that is also strangely prison-like.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

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

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

Beirut's thinnest building was the result of feuding brothers.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Go inside to really appreciate this 500-year-old technological masterpiece.

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

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

A whimsical bridge adorned with decorative dragons.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.