In the Museum of the Fortress you can see items of soldiers' equipment, flasks, sabers, medals and badges.
The exhibition is supplemented with pipes, snuff boxes, lighters, cigarette cases and items made by the soldiers, officers' portraits, battle paintings, maps, artillery fuses and various elements of the armored equipment and cannons.
The largest and the most impressive exhibit - armored observation tower of the fort IV Optyń towers and armored elements of the XV fort Borek in Siedliska.