Introduction to the Petrified Wood Geopark: The Petrified Wood Geopark has a total area of 226 square kilometers, containing 5 scenic spots and numerous geological, cultural and natural landscapes. It is the only petrified wood group in the country that mainly consists of typical, rare and precious petrified wood groups. National Geopark. There is a petrified wood exhibition hall in the park, which displays display panels recording geological changes and various types of domestic and foreign petrified wood. The Yanshan Tianchi in the scenic spot is the Baihebao Reservoir. It is located in the Baihebao volcanic lava basin formed in the Mesozoic Era, with an altitude of about 560 meters and a water surface area of about 5 million square meters. It is the highest water body in Beijing and is known as a high gorge and flat lake.