This was once the center of the Birdman cult, and is now a World Heritage Site.

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

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

Legend says this cave housed a 16th-century cannibal and his family of 48.

The largest stone moai on Rapa Nui.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

An isolated village literally built into the crevices and rock formations of a mountain.

Caves famous for the dragon-slaying saint who lived there.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Balconies that have a most unusual accent.

"Drunken ship" sculpture memorializing the French poet in the city where he died.

This small Irish village suffered the greatest loss of life when the Titanic sank.

Despite its name this unique art piece was established to commemorate a tragic flood.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.