Międzyrzecki Reinforced Region, MRU – Polish name: Reinforced Arch of the Odra and Warta Rivers: a system of reinforcements constructed by Germans in the years 1934-1944 to protect the Eastern border.
Address: Pniewo 1, 66-300 Międzyrzecz
Tel.: 95 741 99 99
Borszyńska Loop: a traditional name used to describe a part of subways of the Międzyrzecki Reinforced Region, which were to form a base for the armoured battery No. 5, which was never constructed.
Address: Boryszyn, 66-218 Lubrza
Tel.: 601 700 274