ELI5: Explain Like I'm 5

Diefenbunker

The diefenbunker is like a really big secret hideout that was built a long time ago for important people to stay safe in case something bad happened. It's underground and has lots of rooms and supplies, like food and water, in case they needed to stay there for a long time. It was named after a man named Diefenbaker who was really important in Canada a while ago. Now it's not used anymore, but you can still go visit it and see what it was like.