Geography of Europe is not surrounded by sea and its southeastern border has always been variously defined for centuries. In terms of shape, Europe is a collection of connected peninsulas and nearby islands. The two largest peninsulas are mainland Europe and Scandinavia to the north, divided from each other by the Baltic Sea. Three smaller peninsulas—Iberia, Italy and the Balkans—emerge from the southern margin of the mainland. The Balkan peninsula is separated from Asia by the Black and Aegean Seas. Italy is separated from the Balkans by the Adriatic Sea, and from Iberia by the Mediterranean Sea, which also separates Europe from Africa.
Plymouth Sound, Shores and Cliffs Plymouth Sound, Shores and Cliffs Plymouth Sound, Shores and Cliffs is a Site of Special Scientific Interest (SSSI) around the Plymouth Sound, a large area of water where the River Plym and Tamar meet. It stretches across the two ceremonial counties of Devon and Cornwall and the unitary authority area of Plymouth. It contains fossils of plants and sea creatures and its cliffs show a timeline of the Middle to Early Devonian period hundreds of millions of years ago. Lower to early Middle Devonian units of rock are visible from sections through the coastal cliffs and intertidal zones, which were