Mar Menor (Little Sea) is a unique area located on the east coast of Spain, within the region of Murcia, just above the city of Cartagena. Few regions have the good fortune to have both a saltwater lake and a Mediterranean shore. The region of Murcia has both and the salt water lake with an area of 170sq.km is known as Mar Menor, the largest salt water lake in Europe. Mar Menor is part of the Costa Calida.