In the heart of the Po River Valley, the Province of Lodi is agricultural land dotted with a fascinating array of castles and religious sanctuaries. The gently-sweepingLodi plain is interrupted here and there with bodies of water and, after all, was in part formed by the floodwaters of the River Adda. It is fertile with a sub-stratum of clay, used in local ceramics production. The terrain boasts various protected areas and natural parks, notably the Regional Park of the Southern Adda that straddles Lodi and Cremona.