This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

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

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

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

A striking 12th-century-style castle built on the edge of a cliff.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

In 1396, two Scottish clans that had been violently feuding for centuries finally faced off in a bloody battle in this park.

This plaque tells the story of an event that took place in an imagined parallel universe.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

The Indian capital of black magic and witchcraft.

A little church on a tiny island looks like something from a fairy tale.

This factory made "health corsets" that were a step towards liberating women's bodies.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

This little museum in the town where zombies were born celebrates the living dead.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

This striking landscape in northern Vietnam contains both geological and archaeological wonders.

This spiritual landmark for practicers of Shamanism is drenched in milk and vodka and covered in blue scarves.

The premier place to experience the Victorian imagining of the steam-powered future.