The Strait of Gibraltar (; , Archaic: Pillars of Hercules), also known as the Straits of Gibraltar, is a narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa. The two continents are separated by of ocean at the Strait's narrowest point between Point Marroquí in Spain and Point Cires in Morocco. Ferries cross between the two continents every day in as little as 35 minutes. The Strait's depth ranges between which possibly interacted with the lower mean sea level of the last major glaciation 20,000 years ago when the level of the sea is believed to have been lower by . The strait lies in the territorial waters of Morocco, Spain, and the British overseas territory of Gibraltar. Under the United Nations Convention on the Law of the Sea, foreign vessels and aircraft have the freedom of navigation and overflight to cross the strait of Gibraltar in case of continuous transit. Names and etymology The name comes from the Rock of Gibraltar, which in turn originates from the Arabic (meaning "Tariq's Mount"), named after Tariq ibn Ziyad. It is also known as the Straits of Gibraltar, the Gut of Gibraltar (although this is mostly archaic), the STROG (STRait Of Gibraltar) in naval use. Another Arabic name is (), meaning "Gate of the West" or "Gate of the sunset", and furthermore "Gate of the Maghreb" or "Gate of Morocco". In the Middle Ages it was called in Arabic (), "the Passage" and by the Romans (Strait of Cadiz). In Latin it has been called , based on the name from antiquity "Pillars of Hercules" (), referring to the mountains as pillars, such as Gibraltar, flanking the strait. Location On the northern side of the Strait are Spain and Gibraltar (a British overseas territory in the Iberian Peninsula), while on the southern side are Morocco and Ceuta (a Spanish autonomous city in northern Africa). Its boundaries were known in antiquity as the Pillars of Hercules. Due to its location, the Strait is commonly used for illegal immigration from Africa to Europe. Extent The International Hydrographic Organization defines the limits of the Strait of Gibraltar as follows: On the West. A line joining Cape Trafalgar to Cape Spartel. On the East. A line joining Europa Point to P. Almina. Geology The seabed of the Strait is composed of synorogenic Betic-Rif