This tiny island in the South China Sea is crawling with venomous sea snakes.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

Malaysian fireflies create a dazzling display as thousands light up in unison.

Of five volcanoes located in the massive Tengger caldera, this cone is the youngest and most active.

One of Indonesia's tallest, this waterfall takes a 390-foot plunge into the Lake Toba caldera.

Explore a uniquely pristine Borneo forest, now protected by former headhunters turned tour guides.

These broken shards of ancient ruin may hide an ancient pyramid.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

A real-life "hobbit" cave in Flores, Indonesia.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

Three wildly colorful calderas top this otherworldly volcano chain.

A sprawling nature preserve harbors the world's only living dragons.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

The ship that got left behind.

Megapodes incubate their eggs using the heat of an active volcano on this Pacific isle.

Two World War II aircraft lie within the jungle around this abandoned runway.

Réunion Island's highest point is a 2 million-year-old volcano and a paraglider's paradise.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

Deadliest lake in the world suffocated over 1,746 people in one night.

Nature’s skyscraper launches out of the terrain with attitude.

Once a bustling fishing village and trading post, today these Cape Verde ruins provide a home only for seabirds and turtles.

At Ghana's largest wildlife refuge you feel like you're right in the animals' backyard.