Plot hole: The movie is allegedly set about ten years after the death of the German soldiers, since the daughter of one soldier is in her early teens. But none of the items in the scenery look like they're out of the fifties.
Zombie Lake (1981)
1 plot hole
Directed by: Jean Rollin, Julian de Laserna
Starring: Antonio Mayans, Anouchka, Howard Vernon, Pierre-Marie Escourrou
Revealing mistake: In many scenes and screenshots you can see that make-up was made sloppily: the faces of the undead Germans are rotting green, but their necks still retain a 'live' color. (00:52:20)