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

The stoutest tree in the world.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

Hideout of thieves, monks, and goat-footed gods.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

The longest living non-clonal organisms on Earth.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The underground sanctuary of a mysterious ancient cult.

Native Americans built this circle of stones, which was used to predict astronomical events.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

These subterranean storage areas hold emergency water reserves.

The miraculous hydrant that saved the Mission District in 1906.