Wow, that’s a fun place to visit. You will look back on the history, how England and Japan fight during the world war II. The building is not that old, but the construction was unique, with all the tunnels….. it is a marvels of technology. But, the tunnels are quite creepy, they are very dark, even some of the tunnels have bats. So, be careful when you walk in the tunnels.
You will get a chance to see an old fashioned toilet, which call bucket system. Just like the old time, they shit on the pail then they need to throw away by themselves. There are also an old kitchen, the stove is the one my grand grand parent using, which need to burn wood to cook.
Its nice, you can get more information in my podcast show. I will talk about it some day.