A military bunker located near the town of Jablonné v Podještědí in the Liberec Region of Czechia. The designation 'Pěchotní srub' translates to 'infantry bunker' and 'K-S' likely refers to a specific Czech fortification type or classification, possibly from the interwar or World War II period. The precise historical context, construction date, and operational history of this specific structure are not confirmed by the provided search results, which contain no information relevant to this location in Central Europe.
The region has a history of military fortifications, particularly from the Czechoslovak border defense systems of the 1930s and subsequent German occupation modifications, but any specific attribution for this bunker requires further localized historical or archaeological verification.