The Mar Menor is the coastal unique lagoon in Europe designated by United Nations as Zone Specially protected because of its importance for the Mediterranean.

Opened to the sea, it is a lagoon of salty water, placed close to the Mediterranean Sea. Its special ecological and natural characteristics do of the Mar Menor a natural unique place and the lake of bigger salty water of Europe with special therapeutic conditions.

Of semicircular form, it is separated from the Mediterranean Sea by a band of sand of 22 km from length and between 100 and 1200 metres of width, named La Manga del Mar Menor. In its coastal perimeter it relies on 73 km of coast in which there are happening beaches of transparent and slightly deep waters (the maximum depth is not superior to 7 meters), and with 170 km² of surface.

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