Local legend says the remains of Father Christmas lie within the medieval grounds.

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

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

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Explore the dark underground corridors of this graffiti-covered former military fortification.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

Ruins of a historic medical facility sits eerily by the water.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

A former copper mine which became a truly unsuccessful prison.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

The Atlantis of Cape Cod reemerges during the lowest of tides.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

Around 100 sculptures from artists all over the world decorate the hiking trails surrounding this locale.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Even Henry David Thoreau found this glacial pothole irresistible.