Where else would you find a town that is also a country? Gibraltar is only 5.8 sq. km (2 1/4 sq. miles) in size, but it has its own airport, currency, postage stamps, newspapers, radio, TV, naval and military garrisons, two cathedrals, and a casino. "The Rock" (or simply 'Gib') is an overseas territory of the United Kingdom on the southern coast of Spain at the entrance to the Mediterranean sea. Its inhabitants enjoy a pleasant climate, and the region has a recorded history dating from A.D. 711 with traces of cave occupation dating 40,000 years ago. The Rock of Gibraltar is a massive limestone rock rising out of the sea to a height of 425m (1,396 ft.). It is often referred to as the Gateway to the Mediterranean and was originally a Phoenician trading post called Calpe. This is a unique place for the curious traveller. The inside of the rock itself is an absolute labyrinth with the secret internal roads and tunnels 4 times longer than those on the surface. Military presence and security in this otherwise deserted area is strong but almost invisible.