The highest waterfall in Italy is only "turned on" five times a year.

A military museum, art park, mausoleum, and architectural oddity all on one fascist's estate.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

Myanmar's Mount Olympus atop a 2,500-foot volcanic plug.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

A battle between nature and architecture in the Cambodian jungle.

A quick and simple solution to Cambodia's train woes.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Khmer Rouge's high security prison.

Hundreds of Buddhas in a re-discovered Indonesian temple.

A Buddhist theme park brings you a Buddhist version of Hell.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

A licentious look into Singapore's past, full of disorderly bric-a-brac and disreputable characters.

A museum glorifying the life of Stalin, located in the city of his birth.

Ancient rock-hewn town that witnessed key events of Georgian history.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

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

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

Giant stone letters dedicated to the founder of Armenia's alphabet.

A geological bull's-eye visible from outer space.

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