Hiroshima City, facing the Seto Inland Sea, is the most prominent cities in the Chugoku region, and a center of the administration and economy of Hiroshima Prefecture. Six rivers flow through the city, so it is often called the "City of Water." It was devastated by an atomic bomb in World War II. All of the buildings in the surrounding area were destroyed. Hiroshima, where the Hiroshima Atomic Bomb Dome (Genbaku Dome) miraculously remained standing, is internationally known as the "City of Peace." Hiroshima also offers a number of gastronomical pleasures, including oysters that are said to have been cultured there since the 16th century, and Hiroshima-style 'okonomi-yaki,' unique flour crepes fried with vegetables and noodles that are slightly different in flavor at each restaurant.