A nature reserve with some of the best beaches in the world, in particular Rodas Beach on Monteagudo. Great for a day trip from Vigo but even better to camp. No cars, no rubbish bins (take your rubbish back to Vigo!), awesome sunsets over the sea, wonderful flora and fauna (especially birds). Summer only. Plan ahead for the boat and camping!
www.campingislascies.com/
Google map: bit.ly/116qRtr