Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

The enigmatic and seldom visited ruins of a Mayan city-state.

Singing sand that stands as the final remains of an ancient lake.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

The foundations of a forgotten fortress, wedged in between two streams.

A Cold War command center is hidden under an idyllic countryside.

Michael Heizer's masterwork in the Nevada Basin.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The smallest country in the world.

Only intact Ichthyosaur skeleton in the United States.

A picture-perfect town, perfect for blowing up.