The encased skull that is widely believed to belong to St. John the Baptist.

Sleep in a climate-controlled plastic bubble for the night.

This portrait of Philip V is always hung upside down, in a protest three centuries in the making.

A cheese discovery made by shepherds became the pride of a region.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

This house's itty bitty size means no humans allowed.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

This little gallery is devoted to one small town's passion for a very special cheese.

A Swedish farm is the world's only producer of the rare, creamy delicacy that is moose cheese.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

The world's first ice hotel is still one of the most elaborate and beautiful.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Amsterdam's Red Light District leaves little to the imagination.

This towering church is home to a world-famous organ and a treasure trove of medieval art.