The Laolongdong scenic spot in Nanshan, Chongqing, is very hidden. Seen from the outside, it will make you lose the interest of visiting. Because the scenic spot is in a karst cave underground, look from the outside, faint, just a field; the outside of the scenic spot is also like a farmhouse. In fact, "Laolongdong" scenic spots are very distinctive, especially the caves inside, which are 6 kilometers long, warm in winter and cool in summer, and have very geological characteristics. Some places are not yet open. Ticket 28 yuan per person, pass, boating and commentator.