France and Spain have a timeshare called Pheasant Island. They alternate ownership every six months.
The island is a condominium[2] established by the Treaty of the Pyrenees in 1659, under joint sovereignty of Spain and France, and for alternating periods of six months is officially under the governance of the naval commanders of San Sebastián, Spain (1 February – 31 July) and of Bayonne, France (1 August – 31 January); in effect it is administered respectively by Irun (in Gipuzkoa, Spain) and Hendaye (in the Pyrénées-Atlantiques, France).[3]
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