Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

A magnificent Neogothic tomb hides within this Italian fairytale-like forest.

These wooden balconies that are both decorative and functional.

These ruins are all that remain of Tortosa’s lost coal gas manufacturing industry.

The tiny Spanish village that long refused to change its outrageously anti-Semitic name.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

A pre-Hispanic pyramid in the middle of a tourist district in the Canary Islands.

A dictator's failed public works project has been reborn as two linked trails through spectacular scenery.

A historic Christian shrine nestled within a spectacular natural cave.

A site outside Pedraza, Spain where a plaque tells a tale of seven-legged creatures that were said to have once lived in the area—in the fictional world of Kcymaerxthaere.

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Possibly the oldest masonry dam in all of Europe.

An ongoing medieval tradition of communal pig husbandry is honored with a handsome granite sculpture.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

Shrapnel, dynamite, bullets and Franco couldn't destroy this bust, rescued and kept hidden as a family secret for over 40 years.

Whether they are bulls or pigs, these ancient animal sculptures are fascinating relics.

This ancient rock painting is the oldest evidence of humans’ love affair with honey.

Sanctuary on a ridge near an ancient shrine to a "Black Madonna" built by the founder of Opus Dei.

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.