D.C. once had its own tiny rival to the New York Stock Exchange.

The most accurate timepiece in the world.

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A more chill but no less fascinating version of the famous ancient archeological site.

This rickety old shed hides a trove of secondhand literary treasures.

In Phetchaburi, Thailand, a roadside vendor cooks his fare with 1,000 mirrors and the power of the sun.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.