This ancient Irish tower could easily have stood in for Rapunzel's prison.

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

Experience what life was like in Ireland during the Viking and medieval ages.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The world's second largest single-dish radio telescope, once used to contact E.T.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

The world's brightest bioluminescent bay.

Enjoy the waters of this half-moon-shaped natural pool surrounded by breathtaking scenery.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

One of the largest public collection of historic armored and military vehicles in North America.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This is the house that spite built.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.