The Cíes Islands are the greatest treasure of the Vigo estuary: an incredible Maritime-Terrestrial National Park and one of the most beautiful places in the country, hence the Romans named them the “Islands of the Gods”. The Cíes archipelago consists of 3 islands: Monte Agudo, O Faro and San Martiño. The first two are joined by a long sandy beach, Rodas Beach, considered the best beach in the world, according to The Guardian.