I was part of a Leger Battlefield tour group, focusing on the U Boat role in the 2nd World War. As part of the tour we visited this bunker / air-raid shelter. It was an amazing visit , very atmospheric climbing the stairs to the various levels of the bunker. There is the most amazing collection of 2nd World War ephemera I have ever seen , posters , pictures , maps , photos and militaria. One photo sticks in my mind , it was taken following an Allied bombing raid , the only thing left standing was the bunker, the area around it had been completely flattened . The curator was a nice guy , very enthusiastic and keen about his bunker. If you have mobility issues the stairs could be a problem. If you get the chance visit this bunker it's amazing.