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.

What makes the tunnels in western Poland an ideal hibernation site for bats?

• The presence of food sources

• Proximity to water bodies

• Stable temperature and high humidity

• Lack of predators

What was the primary purpose of the Oswald Line during World War II?

• To provide housing for soldiers

• To defend against attacks from Poland or the Soviet Union

• To act as a supply route

• To serve as a communication line

How long is the Oswald Line's defensive structure?

• 120 kilometers

• 90 kilometers

• 60 kilometers

• 30 kilometers

Why are visits to the tunnels strictly controlled?

• To avoid disturbing the hibernating bats

• To prevent theft of artifacts

• To limit the number of tourists

• To protect the structural integrity of the tunnels

What could happen if a hibernating bat is disturbed?

• It will start hibernating again

• It might fly away

• It could die suddenly

• It will become aggressive