ww2 German tunnel in Kalivaki, Crete

Hey,

Sorry if I’m writing in the wrong forum. I stumbled across an underground complex near a beach called ‘kalivaki’ in the town of Goergioupolis in Crete. I can’t find any information on it online. I’m almost certain it’s a German ww2 tunnel as it has ‘1943’ carved into the rock inside one of the tunnels. Does anyone have any further information on this site? I have a video of anyone is interested.

Thanks,

Harry