Las Caldas Cave and the surrounding partial nature reserve (Reserva Natural Parcial de la Cueva de las Caldas) is a protected area covering 45 hectares within the Nalón Valley in the Municipality of Oviedo in the vicinity of the towns of La Piñera and Las Caldas.
The cave itself has a length of about 600 m and has three entrances. The main cavity is around 5 m high and contains a subterranean river. The cave has no particular geological significance but it is important for the wildlife and archaeological sites from the Solutrean and Magdalenian periods located there.[1]
Archeological excavations in the cave have become one of the most important Upper Paleolithic sites in the Asturias region. Finds from the cave are of exceptional quality[2] and include amongst others: