Laoheishan volcano, located in Wudalianchi City, Heilongjiang Province, is the second largest volcano with an elevation of 515.9 meters. Panshan Road is needed to climb up the crater. The crater is funnel-shaped, with a diameter of about 350 meters and a depth of about 140 meters. There are pavements around the crater, which can be seen in circles. The volcano erupted for the first time in 1741 and many weeds were found growing in the crater. Laoheishan is surrounded by lava platform, which is a 10 km long stone sea formed by the flow of lava ejected in that year. Down from the crater and along the trestle road, you can enjoy the various shapes of the Shihai Sea.