Situated in west-central Germany, Hesse state borders the German states of (starting in the north and proceeding clockwise) Lower Saxony, Thuringia, Bavaria, Baden-Württemberg, Rhineland-Palatinate and North Rhine-Westphalia. The principal cities of Hesse include Frankfurt am Main, Wiesbaden, Darmstadt, Offenbach, Hanau, Gießen, Wetzlar, andLimburg in the greater Rhine Main Area, Fulda in the east, and Kassel and Marburg an der Lahn in the north.
The countryside is hilly and there are numerous mountain ranges, including the Rhön, the Westerwald, the Taunus, the Vogelsberg, the Knüll and the Spessart. Most of the population of Hesse is in the southern part of Hesse in the Rhine Main Area. The Rhine borders Hesse on the southwest without running through the state, only one old arm – the so-called Alt-Rhein – runs through Hesse. Hesse is the greenest state in Germany. Forest covers 42% of the state