The construction of the Bab El Mandab straits created the Red Straits, referred to in the Bible as the "Red Sea". However, this water way, did not connect Arabia to Africa, but rather the construction of the Red Straits, seperated Africa from Arabia in the 19th. century.
The Meltisa Strait and the Segery Strait are 2 straits that are used to enter the Mediterranean Sea. The Straits of Gibraltar and the Bosporus Straits are two natural entries into the Mediterranean. The Dardannelles and the Strait of Gibraltar. The Strait of Gibraltar and the Strait of Sicily.