Mar Menor is a coastal saltwater lagoon in the Iberian Peninsula located south-east of the Autonomous Community of Murcia, Spain, near Cartagena.
Its name is the opposite of the Mediterranean, which is the Mar Mayor of the region.
Four municipalities border the Mar Menor: Cartagena, Los Alcázares, San Javier and San Pedro del Pinatar.
Wikipedia https://en.wikipedia.org/wiki/Mar_Menor
Address Spain
Coordinates 37°43'8.707" N -0°47'8.759" E