unfinished, concrete lesniewo gorne lock, part of the masurian canal, warmian-masurian voivodeship, poland.

architecture attraction beton bunker channel complex concrete construction dam defense defensive europe european famous fortifications furstenau gate german gorne gasup3 rne heritage historic historical history hydraulic landmark landscape le lesniewo lock masuria mazury military monument nature nazi niewo oberschluese old poland polish shelter sightseeing tourism tourist touristic travel trip vacation war water