The abandoned buildings of a hospital that saw most of its activity during the World Wars.

The United Arab Emirates's biggest and oldest fort pays homage to a lost era.

This beautifully restored fortification kept the city safe for centuries.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

This spa theme park lets its guests take a dip in pools of coffee, wine, or ramen broth.

Nestled amid the trees lies an abandoned funicular railway that dates back to the 1920s.

Approximately 300 million years ago, a massive coral reef existed in what is now the largest limestone cave in Japan.

This amusement park brings a little slice of England to the heart of Kyushu.

These wondrously illuminated caverns extend under the mountains of the Fukushima Prefecture.

The place of worship erected not once, but three times in one of the most desolate places on Earth.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

A wooden hut from the Heroic Age of Antarctic Exploration.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

A quaint amusement park now sits, rusting and forgotten among the foliage.