A 16th-century horror show built in a lovely Italian garden.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Part museum, part piece of Arthurian-inspired history, this stately hall attracts King Arthur fans from miles away.

A fantastic castle rumored to be the birthplace of King Arthur.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.