Gibraltar shares border with European Union
Geography
Gibraltar's territory covers 6.7 km2 (2.6 sq mi) and shares a 1.2 km (0.75 mi) land border with Spain. The town of La Línea de la Concepción, a municipality of the province of Cádiz, lies on the Spanish side of the border. The Spanish hinterland forms the comarca of Campo de Gibraltar (literally "Countryside of Gibraltar"). The shoreline measures 12 km (7.5 mi) in length. There are two coasts ("Sides") of Gibraltar: the East Side, which contains the settlements of Sandy Bay and Catalan Bay; and the Westside, where the vast majority of the population lives. Gibraltar has no administrative divisions but is divided into seven Major Residential Areas.
Having negligible natural resources and few natural freshwater resources, limited to natural wells in the north, until recently Gibraltar used large concrete or natural rock water catchments to collect rainwater. Fresh water from the boreholes is nowadays supplemented by two desalination plants: a reverse osmosis plant, constructed in a tunnel within the rock, and a multi-stage flash distillation plant at North Mole.Gibraltar's terrain consists of the 426 m-high (1,398 ft) Rock of Gibraltar made of Jurassic limestone, and the narrow coastal lowland surrounding it. It contains many tunnelled roads, most of which are still operated by the military and closed to the general public.
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