We joined an excavation tour, it was great. We enter into an underground place where people at that era stays (it was not underground that time). It made us imagine how people in 14th century lives. There’s a lot of stories about murder and revenge among families, well that’s the friendliness of Czech people the guide said. Prague underground are well preserved. Anything above it had changed several times (built and destroyed and built and destroyed) but the underground stays the same ….