This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Described as "the world's most blinging pool."

The highest monastery in the world operates a tiny guesthouse with doors open to all.

This network of tunnels housed an entire village for years, and even had a hall for screening movies.

World's largest cave was only discovered in 1991, and now offers tours to the public.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

An abandoned Byzantine fortress and notorious prison.

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.