The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The tiniest little stage in New York.

A Spanish-style estate that has traded black ties for rock concerts.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

One kilometer of thick brass rod laid out before your eyes.

Read a book next to a Midtown waterfall.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Tucked in the back of this amazing antique store is an important piece of medical history.

A terrific purveyor of natural history objects and curios.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

Discover the taste of mold.

A seemingly endless landscape of pure salt stretches far across Bolivia.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

Some of the earliest burial grounds of New York State are to be found hidden away in this quaint town.

A turquoise lake within a volcanic crater.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.