Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

Bohol's mysterious brown hills.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

A magically clear, blue river that seems to spring from nowhere.

More than 200 statues filled with cryptic symbols give this park spot an aura of horror vacui fantasy.

Buried in the Laos jungle is a sanctuary for bears that would have otherwise been milked to death by poachers.

A mysterious, hidden cluster of Buddha sculptures carved into the rocks.

Abandoned limestone cave was once a sacred place of worship.

This mysteriously shaped boulder may have been used for human sacrifice in ancient times.

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

This ruined temple's giant Buddha statue bears the scars of the Second Indochina War.

A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

The river depicted in the antiwar film 'Apocalypse Now' was likely based on this Mekong tributary.

Arguing within this idyllic, circular volcanic lake is forbidden.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

One of the biggest markets in Asia, under one of the continent's largest domes.

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

Khmer Rouge's high security prison.

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

More than 100 Hindu temples are slowly being swallowed by the forest.

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

A small 12th-century temple surrounded by waters believed to have curative properties.

A gruesome memorial for those lost in this area during the Khmer Rouge genocide.