A low-lying region with excellent natural harbors along the Baltic coast, the state has fertile agricultural land except in the center, where heaths and moors predominate. Farming (grain, potatoes, and vegetables) and cattle raising are pursued, although agricultural production accounts for less than one tenth of the state's yearly output. Shipping and fishing are important along the coasts. Manufactures of Schleswig-Holstein include ships, textiles, electrical goods, paper, clothing, and machinery. There are oil fields in the Dithmarschen region in the southwest. The islands of Sylt and Föhr and the southern Baltic coast are popular tourist resorts, while Eutin, Lübeck, and Schleswig are historic centers.