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

The world's oldest bookshop still in operation.

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

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

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

The history of this Moorish castle includes royals, a Mexican-Spanish association, and several attempts at lodging.

This historical manor is complete with a magnificent garden.

Spain's largest bullring offers a unique glimpse at architecture and history.

This memorial, built by fascist dictator General Franco in 1960, has been repurposed by the people of Catalonia.

The first mechanized factory in Spain is also one of the most significant mints in the history of money.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

A monument at Alicante Marina honors a little-known hero of the Spanish Civil War.

This replica of Columbus's famous ship houses the history of La Palma's maritime importance during the Age of Exploration.

One of the most important Celtic-Roman archaeological sites in Spain.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

An archaeological museum squeezed into a narrow 15th-century gate tower accessed only by a spiral staircase.

This ancient amphitheater was restored in the early 1990s.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

This Roman arena once played host to bloody gladiatorial battles.

The tallest tower in Cáceres's Old Town.

Two large posteriors in one giant statue.

This abandoned gold mine found a second life as a post-apocalyptic film set.

A rocky face gazes out over an enormous volcanic crater.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.