The World Heritage–listed Cueva del Pindal contains 31 Palaeolithic paintings and engravings of animals, including rare depictions of a mammoth and a fish. It's not in the same league as the Altamira or Tito Bustillo caves, but it was the first cave with prehistoric art to be discovered in Asturias; with its setting among wooded sea-cliffs and with a 16th-century chapel, ruined Romanesque monastery and interpretation centre nearby, it's an appealing visit.
Reserving cave visits by phone is strongly recommended; a maximum of six groups of 20 can enter each day.