The Fortified Front Oder-Warthe-Bogen (Festungsfront Oder-Warthe) was built just before World War II and included a system of fortifications, channels, bridges, road and railway blocks, and bunkers, connected with the underground fortifications, connecting the Lower Oder river line to the south with the Pomeranian Wall to the north. The local company bunkry24pl organises guided tours of the underground fortifications between 15 April and 15 October.