Heidelberg Castle is built at the bottom of the valley on the northern slope of King's Throne Hill, surrounded by thick green trees. Historically, castles have been expanded several times, gradually forming a defensive and representative architectural complex with a solemn and magnificent style. The Castle features Friedrich Palace, the German Medical Museum, Terrace Gardens and underground wine cellars with a collection of Electoral Sculptures. I particularly like the German Museum of Medicine, which shows the history of ancient German medicine. There are many interesting bottles and cans, rare birds and animals, magical herbs, quite magical. To put it another way, I was walking around the castle when I saw a cleaner besides moss, who was very ceremonial about such an insignificant and unclean job. He sat on the ground on both knees and handled it quietly and slowly. I was deeply impressed by the seriousness and spirit of this kind of work. As the old Chinese saying goes, "great things must be done in detail, difficult things must be done in easy" This kind of craftsmanship spirit makes me particularly admire. If you want to take a panoramic view of Heidelberg Castle, you can take the philosopher's path to climb the opposite mountain to shoot.