Umia-O Grove intertidal complex Nature · O Grove, Salnés, Pontevedra The Complexo Intermareal Umia-O Grove, A Lanzada, punta Carreirón e lagoa Bodeira is a wetland of about 2,800 hectares that extends along the Arousa estuary, between the municipalities of O Grove, Cambados, Sanxenxo, Meaño, Ribadumia and A Illa de Arousa. It brings together the mouth of the Umia river, the A Lanzada dune isthmus, the cliffs of the O Grove coast, several islets south of the Illa de Arousa and the lagoa Bodeira, the only freshwater coastal lagoon in the province of Pontevedra. It has been designated a ZEPA (Spain's Special Protection Area for Birds) since 1990, is included in the Rede Natura 2000 network and is recognised as a wetland of international importance under the Ramsar Convention; in winter it holds between 13,000 and 16,000 water birds, the main site for this fauna in Galicia. Photo: Iago Pillado (CC BY-SA 3.0) What to see and do in O Grove