Take the exit from the main road towards Lake Ciborze (frequently used by local anglers), cross the dyke separating the lake from the Ołobok broads and follow a narrow path through thick vegetation to reach bunker 623. The fortification was built to defend the nearby weir, which allowed damming the water and connecting Lake Ciborze with the Ołobok river and its broads. The bunker is a single-storey structure with two cupolas, an M19 mortar, a casemate and an observation turret.