A Turkish ghost town abandoned in a population exchange with Greece.

This famous city eluded concrete detection until the early 2000's.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A marvel of Byzantine engineering under the streets of Istanbul.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Victoriana on Orange Grove Avenue.

A Masterpiece with a Tragic History.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

America's most famous piece of self-built architecture.

Historic funicular railway, believed to be the shortest railroad in the world.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.