Longtan Mountain, called "Nishiha Mountain" in ancient times, belongs to the south branch of Longgang Mountain in Changbai Mountain range, located in Longtan District, northeast corner of Jilin City, Jilin Province, on the east bank of Songhua River, with an area of 234 hectares. The main peak, commonly known as the "Nantianmen", is 338.3 meters above sea level.
The east and south of Longtan Mountain are hills, and the west is Songhua River. In the southwest, Dongtuan Mountain faces each other across the Ga, and the two mountains are 2.5 kilometers apart. In the northwest, across the Songhua River, it faces the West Mountain of Sanjiazi Qijiazi, and the two mountains intersect for 14 km. The shape of the mountain is Wolong, high in the west and low in the east, which looks like a basin. The mountains on both sides are steep, the peaks in the west are steep, and the roads in the east are winding.
Longtan Mountain Park was established in April, 2006, 1957, which belongs to the garden department of Jilin City, Jilin Province. It is a natural garden integrating temples, ancient cities, natural scenery and forests, and it is also a national forest park. There are the famous Koguryo Mountain City, the Water Prison, the Drought Prison and the Nantianmen, as well as the "Longtan Mingyue", "Ancient Temple Group" and "Longfeng Temple", one of the old eight scenic spots in Jilin. There are various legends in Longtan Mountain, such as Longtan Rock, Tankun Nie Long and Shenshu.
Characteristics of Longtan Mountain Park
1, Longtan Mountain "drought prison"
The dry dungeon is located in a higher place at the southern end of the mountain city, between the dungeon and the Nantianmen, about 250 meters away from the dungeon. This is a deep stone pool, polygonal and almost circular. The diameter of the pond is10.6m, and the depth is 2-3m. The wall of the pond is upright like a chisel, and the bottom of the top of the rock is inclined and ladder-shaped, without water accumulation. Legend has it that it is a dungeon for prisoners. According to practical research, it was built by Koguryo people at that time (mostly Han people now) from 37 BC to 660 AD to store food and military supplies. There is no water here all the year round.
2. Nantianmen
Nantianmen is the commanding height of Longtan Mountain, which is about 100 meters higher than the nearby ground. The platform is 20 ~ 25m long and 6 ~ 9m wide. There are red rope tiles on the platform. It is speculated that there are towers and other buildings on it. A four-poster and three-door archway was built on the platform, and the words "Nantianmen" were written on it.
3. Longtan Mountain City
Longtan Mountain is shaped like a basin, surrounded by ridges. The wall of the mountain city stands on the ridge of Longtan Mountain. The plane of the city wall is irregular polygon, narrow from east to west and wide from north to south. The east wall is1082m long, the west wall is 528m long, the south wall is 405m long and the north wall is 38 1 m long.
Refer to the above content: Baidu Encyclopedia-Longtan Mountain