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

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

A majestic hotel for dreamers rises from the center of a fairytale wood.

Elaborate tile work in this railway station tells the story of Portugal.

Dead weights honor the dead of Portugal's fishing industry.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This small chapel is built of human bones and decorated with a golden skeleton.

Houses are tucked between, on, and underneath giant boulders.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The celebrated eyesore created by starry-eyed sweethearts.

The eclectic observatory castle of a 19th-century astronomer and explorer.

Thousands of flamingos and other bird species flourish in these Camargue wetlands.

Small French town or alien garage?

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.