The forgotten chamber: a megalithic mystery beneath Valencina de la Concepción

In the village of Valencina de la Concepción, the heart of the mystery lies beneath an ancient edifice. Discovered in 1917 beneath a modern building, the chamber is 29 meters long, with a diameter of 2.7 meters and a height of about 2 meters. The ceiling is vaulted and covered by a large granite slab. In the center lies a black marble stone with a square depression about 10 cm deep, which is called an altar or offering table. Large stones of other shapes can also be found in the chambers of the dolmens of Antequera. The 1.3-meter-wide and 2-meter-high passage is composed of layers of broken stone and clay and covered with limestone slabs. The orientation of the passage to the west sets it apart from the entrances of the other Megalithic structures in Spain.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons