Fort W XI "Duńkowiczki" is a double-rampart armored artillery fort, whose construction combines concrete, brickwork, and earth. Built near the village of Duńkowiczki between 1854 and 1857 as a rampart of a fortified camp, it was rebuilt between 1881 and 1887, adopting the layout of a pentagonal fort—typical for that period and modeled on similar forts in the region. In the following years, the fort was modernized, with its elements adapted to defensive needs. After the Second Siege of the Przemyśl Fortress in 1915, part of the fort was blown up, and between 1920 and 1930, it suffered further degradation. After World War II, the facility was converted into a mushroom farm and silage storage.
Architecturally, the fort represents a modern, armored type of fortification, characterized by a central double-rampart structure. Numerous elements have been preserved, including the rear barracks (Koszary szyjowe) and shelters. On the crown of the fort, there are traces of rapid-fire anti-assault guns ("Sankpanzer"), and in one of the embrasures, the mechanism for rotating the gun has been preserved. An interesting feature is the huge crater left by a 320 mm mortar shell, located near the right flank of the fort.
Fort W XI "Duńkowiczki" is a significant point in the history of the region's defense and serves as an example of military architecture from the turn of the 19th and 20th centuries.