Long tunnels run under the ancient chariot racing circuit to the tower.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.

Archaeological site of Iberian people ruins.

Remote ruins of a 2,400-year-old Iberian settlement.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

A historic Christian shrine nestled within a spectacular natural cave.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

Mysterious face-like images that appeared within an Andalusian house are surrounded by legends of the paranormal.

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

An archeological treasure trove stumbled upon by a couple of children.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

Seaside ruins of a settlement that date back to the first century B.C.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

A 16th-century Andalusian palace.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.