These shelters were to protect people from bombing during the war. It is believed they were invented by a man named Sir John Anderson.

“One of the walls has been bricked up. I’m 90 percent sure we won’t find out any more rooms but we don’t know. They might have bricked up one of the walls when the house was built to make way for the foundations,” Marks said. “If that’s the case we’ll just have to leave it,” he added.

Once he posted photos of his discovery, his story went viral.

Marks and his father plan on restoring the shelter because they believe it is an important historical monument. According to them, no matter if that period of history is behind, it shouldn’t be forgotten because it lets us see a glimpse of those times.