Known to backpackers as the "Steps of Doom," this walkway carved into the side of a seaside cliff leads to the Roman Tombs.

Writers such as Paul Bowles, William Burroughs, and Samuel Beckett frequented this Tangier bookstore.

The tomb of one of the greatest travelers in history.

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

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

This surreal-looking tree pruned more than 1,000 years ago is still producing olives for oil.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

You can soak in three relaxing pools filled daily by the tide.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

An out-of-place grove of sequoias thrives in northern Spain.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

Abandoned Nazi train station turned underground astroparticle laboratory.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

Cliffside houses provide a spectacular view from their perch above the valley.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

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

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'