A Neolithic burial site erected around 3000 BC.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This 17th-century "unicorn" was cobbled together from the skull of a rhinoceros, the legs of a mammoth, and the horn of a narwhal.

The world's oldest rose is so tough it survived being bombed in World War II.

Medieval ruins on a tiny island amid a flooded lake offer romantic respite to lovers seeking privacy.

The difficulty of getting a good night's sleep is an age-old affliction according to the one-of-a-kind Snoring Museum.

Living trees form the structure of an open-air palace.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

Giant granite sculptures representing family on the northern coast of Spain.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

A darkly erotic open-air statuary in Catalonia.

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

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

Rare karst landscape eroded from a flat seabed.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

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

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

A charming Spanish village sits atop this natural limestone overpass.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.