Antequera has one of the largest and most important prehistoric burial sites in Spain, dating from the Bronze Age. Dolmen Menga is the largest single dolmen in western Europe, and dates from around 2,500BC. It has a 25-metre-long subterranean gallery lined with 32 four-metre-tall stone slabs (mined from a nearby quarry), the largest weighing 180 tons, leading to a burial chamber. Standing just inside, you can see the nearby peak, Peña de los Enamorados (Lovers' Rock), framed in the entrance; at the summer solstice, the sun rises over directly over the peak and shines into the chamber. Dolmen Viera is smaller-scale, with a long, narrow corridor leading to a smaller burial chamber. The third dolmen, El Romeral, is around 3,800 years old - the most recent of the group - and has two domed, brick-lined chambers. All three were probably resting places for important chieftains. Visit the new interpretation centre (2010) to learn more about these fascinating Chalcolithic structures.