Volcanic activity causes small pools of super-heated mud to boil furiously.

This incredibly diverse research station is one of the largest tropical botanical gardens in the world.

Remote Honduran Islands with a colorful history.

Natural saunas fed by volcanic heat.

It's not quite as old as its Roman appearance suggests, but this piece of infrastructure served Guatemala City for centuries.

A century-old bathhouse that provides the luxury of warm water to rural Guatemalans.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

One of the world’s most colorful cemeteries, where each pigment is symbolic.

One of the world's largest pyramids stands within El Mirador, the "lost city of the Maya."

Volcanically heated hot springs.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

A major pre-Columbian archaeological site in central El Salvador.

Antoine de Saint-Exupéry's 1943 book shares a surprising connection with El Salvador.

An intentionally grounded cargo ship remains half-buried in the sand.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

Disused penal colony features prisoner artwork, some sketched in human blood.

There is a small island in the Gulf of Nicoya where the only human inhabitants are dead.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

The translucent turquoise hue of these natural swimming pools comes from a high concentration of minerals.

One Costa Rican island is so beset by illegal shark poachers that the local rangers have built an entire bridge with their confiscated gear .

This abandoned hospital is one of the most haunted places in Costa Rica.

Balanced rock sculptures pay tribute to a murdered conservationist and his pioneer wife.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.