Cova Simanya Gran, a nearly 1,000-foot-long cave in Catalonia, has been at the center of ancient research for years. Particularly accessible, the cave is one of the most visited in the northwest ...

Deep in a cave in Catalonia, Spain, researchers found ancient artwork. Catalan Institute of Human Paleoecology and Social Evolution Cova Simanya Gran, a nearly 1,000-foot-long cave in Catalonia ...

READ: 11 things to know before visiting Spain. The Altamira cave was first closed to the public in 1977, when the body heat and CO2 from 3,000 daily visitors were found to be damaging the paintings.