The Monasteries Islands (Ilhéu dos Mosteiros) are west of Sao Miguel Island. The town of Mosteiros is the namesake of these islands and is about 800 meters from the coast. Bathed by the Atlantic Ocean, the islands were originally part of a volcanic cone, but today, thanks to erosion from the sea, they present different forms with shear walls. In some places, this set of reddish black stone islands of volcanic origin reach an altitude of 72 meters above sea level. They are home to many migratory birds that rest before embarking on new routes.