Brandenburg is geographically the largest of Germany's five new Länder, though it has a very low population density, largely because it is now shorn of Berlin, its epicentre and traditional capital. Its landscape consists in the main of undulating farmland and sandy forests which are unexceptional but by no means unattractive. In lieu of Berlin, the old royal residence of Potsdam on its outskirts has taken over as Land capital, and its outstanding assemblage of Baroque and Rococo palaces and parks is the province's prime tourist draw. West of here lies the long-overshadowed city of Brandenburg which, despite the ravages of war and pollution, preserves an important medieval heritage. The only other major towns, Frankfurt an der Oder and Cottbus , are similarly scarred, though the latter has the good fortune to lie close to the province's one area of outstanding natural beauty, the water-strewn Spreewald , which is still inhabited by the Sorbs, Germany's only indigenous Slav minority.