The area of Cala d’Hort and the islets of the west known as Illots de Ponent comprise one of Eivissa’s main natural areas. Thus, the area was declared a Natural Area of Special Interest by virtue of Law 1/1991, of 30 January, on Natural Spaces and Urban Regulation for Areas of Special Protection of the Balearic Islands.
In February 2002, Cala d’Hort, Cap Llentrisca and Sa Talaia were declared a natural Park, and the Nature Reserves of Es Vedrà, Es Vedranell and the Illots de Ponent were officially declared, by virtue of Decree 24/2002.
Since March 2005, with the enactment of Law 5/2005, of 26 May, on the Conservation of Environmentally Important Sites, the protected area takes in the Nature Reserves of Es Vedrà, Es Vedranell and the Illots de Ponent, as well as their surrounding marine environment. The approval of this law also marked the start of the process for the draft of a new Natural Resources Planning Programme that would not only cover the marine environment and the islets, but also a section of Eivissa.