VOICED : El mayor bunker de murcielagos

The video explores tunnels in western Poland, originally built for German troops during WWII, now home to thousands of hibernating bats. These tunnels provide ideal conditions for bat hibernation due to stable temperatures and high humidity. Located near Mieczyszek, once part of Germany, the tunnels were part of the Oswald line, a defense strategy against potential attacks. The site, now a museum, attracts tourists, but visits are controlled to protect the bats, as disturbing them can be fatal.

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