Garranos of the Sierra da Groba Curiosity · Oia, Baixo Miño, Pontevedra The horses that roam free on the municipality's hills form herds led by a stallion and are only rounded up once a year to be marked and have their manes cut; the municipality preserves several stone curros. Photo: User:Paradanta (CC BY-SA 2.5 es) What to see and do in Oia