This building resembles a large outcrop emerging from the soil. It houses a trove of information about the prehistoric world that existed in the Côa River valley. During the early 1990s, a discovery was made along the banks of the Côa River. Researchers found several locations where flat rock faces above the river contained prehistoric rock art. Unfortunately at the time of this find, plans were underway to build a dam at the mouth of the river to flood the valley. This was designed to store water for release into…