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

The site of an early Arthurian battle and the dwelling-place of prehistoric people and (possibly) an ancient race of giants.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

Though this large circular site is now named for the legendary king, its history dates back to the Neolithic era.

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

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

A former mining village that now operates as an open-air museum.

On the coast of Sardinia, a once-great mining village is finding new life as a coastal resort town.

This cliff-face port is considered a masterpiece of mining engineering.

This weird, elephant-shaped rock also hosts two ancient tombs.

Stalactites and stalagmites in a beautifully lit cave.

A striped 12th-century basilica sits in the countryside of Sardinia.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

Ancient cave tombs known as the "houses of fairies."

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.