Park in the Canary Islands renowned for white dunes that contrast with the turquoise waters of the Atlantic.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

A 700-year-old drinking fountain turned charity for the less fortunate of Zurich.

The stunning interior of this Gothic church is covered in ornate gold details.

Ancient catacombs form the foundation for this Rococo orgy of a church.

A hidden three-foot-wide house separates these two regal churches.

This giant sculpture made of trash is a critique of society's wastefulness.

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

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

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

This unreal Portuguese palace looks as though it's made from a pile of different castles.

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

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

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

Portugal's National Pantheon has a history of curses, collapses and financial problems.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

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

The unfinished final resting place of some of Spain's most prominent politicians.

A stunning example of traditional salt production set against a dramatic volcanic landscape.

Explore the five senses depicted on this protruding Gothic window.

Underneath the well-known Lindenhof hides a secret cellar documenting Zurich's early history.