This series of Armenian caves held the oldest brain, shoe, and winery in the world.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Giant stone letters dedicated to the founder of Armenia's alphabet.

San Francisco's newly reopened hands-on science museum.

Furniture tries to escape an abandoned building in San Francisco.

Where commuters walk through remnants of an ancient Greek necropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Monasteries on rock pillars, once accessible only by frayed ropes.