Before World War II, Jeseniky in former Czechoslovakia were one of most fortified area. This is part of anti-tank obstacles near bunker K-S 5 "U potoka". This bunker was part of defense system situated along the route from Germany (now there's Poland behing the border, but before WWII it was Germany) to the town Kraliky. Because of the Munich treaty (signed in 1938 by Germany, France, Italy and Great Britain) the area was occupied by Germany, and the forts were never used in the battle.