Xiyong Castle is a water Castle left over from the Middle Ages and one of the ten largest castles in Europe. After visiting Xiyong Castle, the poet Byron left behind a famous poem "Prisoner of Xiyong", which made Xiyong Castle more known to people. Xiyong Castle coexists harmoniously with the surrounding mountains and waters. The sunset set sets off her classical standing with red. Every brick and tile witnesses the changes from the Middle Ages to the present. Her beauty has a kind of precipitation of time. History is nothing but the reincarnation of human beings and non-human beings. The whole picture we see today, perhaps, has not changed at sunset for hundreds of years. It's really the Holy Land of Carding that Switzerland must go to. It's really beautiful.