Grosa Island

Grosa Island is an island in the Mediterranean Sea, belonging to the municipality of San Javier in the Region of Murcia, at a distance of 2.5 km from the northern area of La Manga del Mar Menor.

Isla Grosa and the islet of Farallón, like the islands of the Mar Menor, are remains of Quaternary volcanism that took place in the entire Cartagena area between 7.2 and 6.6 million years ago, during the Miocene.

The island is protected within the space called Islands and Islets of the Mediterranean Coast of the Region of Murcia with the category of natural park, it is also a Special Protection Area for Birds, ZEPA, as well as a Site of Community Importance.

The most important archaelogical site found is a Phoenician ship from the 5th century BC. C. that sank with a load consisting of ingots of tin and lead ore.