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

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

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

Mausoleum and Holy Seat of Antiochus I of Commagene.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

Subterranean place of worship in Indonesia.

This abandoned stepwell is one of the largest, deepest, and certainly one of the creepiest in India.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

On the Pakistan-India border the militaries perform an elaborate theater of aggression each and every night.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

Ornate, dome-topped cenotaphs fill this royal crematorium.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Sacred Buddhist home of some spiritual monkeys.