Oolong Canyon Scenic Area - formerly known as Heilongtan, Beijing, Tianjin and Shanghai Tourist Annual Ticket Attractions. In the area of Baili Shanshui Gallery in Qianjiadian Town, Yanqing. There is a strange pool in the deep canyon called Heilongtan. It is located 2 kilometers away from the lower reaches of the Heihe River in the northeast of the park and the dripping pot scenic spot. The scenery is good, but it is not recommended to come here specially. Tickets are 30 yuan, and there is this attraction on the annual ticket for Beijing's scenery. Very small attractions, I accidentally walked away, there is a Dragon King Temple next to it, it is not worth it, the suburban attractions are still low fares.