A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chernobyl disaster.

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

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

The most metal church of all time was built in record time because of an international, pious pissing contest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

A meow-velous tribute to a beloved street cat, made famous on the internet.

An abused and forgotten metropolis, abandoned for centuries.

A deadly ancient portal to the underworld.

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

A marvel of Byzantine engineering under the streets of Istanbul.

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.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

Journey up the capitol building's cupola for an amazing view of Topeka.

A unique blue and yellow phone booth in America's "Little Sweden."

A diverse, expansive nature preserve in northeastern Kansas.

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.