The combat bunker is a small museum equipped with exhibits: replica weapons, original helmets, bayonets and uniforms from World War II.
Established in 2014 thanks to the Association of Soldiers of the Polish Army, Branch No. 5 from Ostróda and the Forest District in Stare Jabłonki. It comprises six bunkers: a combat bunker and five passive shelters dating from 1938. The combat bunker is a small museum equipped with exhibits: replica weapons, original helmets, bayonets and uniforms from World War II. Note: the mini open-air museum is open once a week during the summer season.