Los Alcázares is a municipality and a coastal spa town and former fishing village on the western side of the Mar Menor in the autonomous com…Los Alcázares is a municipality and a coastal spa town and former fishing village on the western side of the Mar Menor in the autonomous community and province of Murcia, southeastern Spain. The Mar Menor belongs to three other municipalities: San Javier, San Pedro del Pinatar and Cartagena and is Europe's largest saltwater lagoon. Connected to the adjacent Mediterranean sea by several channels, the Mar Menor has a surface area of almost 20 km² and the fact that it is typically 2-4 degrees warmer than the Mediterranean, makes it a very popular destination for sailing, windsurfing, kiteboarding and other water sports enthusiasts.