This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Pilgrimage site for star-crossed lovers.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Commonly referred to as the most photographed Victorian home in the United States.

Home of Howard Hughes' Spruce Goose.

An institution that preserves the history of institutionalization.

The capitol city's oldest existing cemetery.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

The largest Star Wars collection in the world is its own galaxy of collectibles.

A mysterious Neolithic tomb is perched along the edge of a modern golf course.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

Petrified footprints of one of the very first vertebrates to walk on land.

This single room has survived the centuries with almost no deterioration.

There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.