アルモリカ山塊
Elevation varies between 42 and 122 meters above sea level. Laval is, in fact, a hilly town, marked by a rocky promontory dominating the valley of the Mayenne river. The castle was built on this promontory and the medieval centre spreads around. The promontory and the slightly hilly landscape around Laval are traces of the Armorican Massif, an old range of mountains that forms the Breton peninsula.