 The Grenzbach, a tributary of the Enz, is the main watercourse and marks its lowest elevation above sea level, Normalnull (NN) at the border with Wiernsheim.The highest elevation, NN, is found at the top of the Geißelberg.Mönsheim's municipal coat of arms shows a white, crenelated tower with a pointed roof on a green three-crested hill upon a field of red.