Castro and Tower of the Lanzada Nature · Sanxenxo, Salnés, Pontevedra A site on the sandy isthmus of Noalla that brings together a castro settlement with its necropolis and the remains of a tower built to protect the salt pans from Norse and Saracen raids; the sea erodes it relentlessly. Photo: Luis Miguel Bugallo Sánchez (Lmbuga) (CC BY-SA 4.0) What to see and do in Sanxenxo