Isla Grosa, Mediterranean island near La Manga del Mar Menor, Spain
Isla Grosa is a volcanic island in the Region of Murcia off southeastern Spain that rises about 90 meters (300 feet) above sea level. It covers roughly 17.5 hectares (43 acres) and sits near La Manga del Mar Menor.
The island served as a training ground for Spanish Navy combat divers and explosive ordnance specialists for many years. It was transferred to regional authorities in 2000 and designated a protected wildlife reserve in 1992.
Archaeological discoveries around the island include a Phoenician shipwreck from the 5th century BC containing African elephant tusks with inscribed markings.
Visiting the island requires special permission from Murcia authorities since it remains strictly protected. You should contact the regional conservation office beforehand to arrange access and understand current visiting conditions.
Meadows of Posidonia oceanica seagrass surround the island and form a vital habitat for Mediterranean life. This underwater plant species plays a key role in supporting marine biodiversity and maintaining the seafloor structure.
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