The location is right next to the Cathedral of Our Lady. The exterior is very inconspicuous. After entering, I found that there is no cave. Fortunately, I didn't miss it. The museum was rebuilt according to the ancient building. The structure is intricate. If you are not careful, you will not find the way. When you go into the depths, there is no one. In addition to historical relics, there are great photography exhibitions when you go, in short, it is a place worth exploring.