Krakow Bunker

The Krakow Bunker is a massive underground bunker built by the Nazis on the edge of Krakow, Poland, as part of the Ark Project during World War II. Inside is a hidden city, where advanced, industrial technology is intertwined with Slavic pagan imagery.

This bunker is later discovered by 12-year old Szymon, who descends into its depths to discover the fate of its former inhabitants but most of all his late mother.

During the attack by Polish resistance force on the bunker, all German civilians seem to have been suffocated by the computer system that operated the bunker to prevent them from interfering with the counter-attacks by the Nazis force.