The world's second-largest sundial, made entirely out of stone.

This mountain trail inspired Nietzsche to complete his magnum opus.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The second oldest continuously operating bar in Louisiana.

This 19th-century fountain's namesake animal isn't what you think it is.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

1513 Turkish world map, full of European state secrets and snarky commentary.

Ancient serpentine sacrifice holder that has stood the test of time.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This art shopping center still boasts pieces of its past as a textile factory.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

The prototype for all Nazi concentration camps.

Giant topiary dog once played a role in a terrorist bomb plot.

A hugely vast Irish landscape of barren rock that stretches for miles.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

The ruins of a medieval monastery named after a type of tree.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

An unusual round church in London with a Templar past.