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A 19th-century aqueduct, similar to the ones built by the Romans. It was designed to bring water to the nearby village of Maro, one of the oldest settlements around the area. Visible on the way to the caves.
A series of caverns of almost 5 km (3.1 mi). One of Spain's major tourist attractions. Concerts are regularly held in one of the chambers, which forms a natural amphitheatre. The cave has the largest stalactite in the world. Not suitable if you have any walking difficulties, as there are many stairs and no ramps. Be aware that the humid air could make your camera lens moist with unclear photos as a result.