Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

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

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

Regency-era excess on the English Coast.

One part local history, 99 parts gruesome haunted house.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Repository for more than 22 million pickled specimens.

Eighty million natural history specimens call this gargantuan museum home.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

An important pilgrimage site for pagans and early Christians, named for a Celtic goddess-turned-saint.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

An abandoned faux-pub made famous by a Guinness commercial.

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

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.