A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

The ruins of an ancient Celtiberian town with incredible rock-cut buildings and a Roman aqueduct.

These magnificently sculpted tombs represent Spain's own legendary version of "Romeo and Juliet."

The chefs at El Diablo use heat generated by an active volcano to cook the food.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

The world's largest wooden structure.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

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

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

Once America's tallest structure, now a Baltimore landmark.