1. Tectonic lake: crater depression or water accumulation caused by crustal tectonic movement. There are three structural forms: first, lakes formed by faults are mainly long and narrow, with shallow water depth, such as Dianchi Lake and Erhai Lake; Second, the lakes formed by stagnant water in the depression basin are generally large in area, such as Qinghai Lake and Poyang Lake. Third, the lake formed by stagnant water in the mouth of a dead mountain fire is small in area, but deep. It is also called the crater lake, such as Tianchi Lake in Changbai Mountain.

2. The dammed lake: It is formed by foreign natural substances or man-made blocking the river and raising the water level. The former is a natural dammed lake, such as Wudalianchi, Jingbo Lake formed by volcanic lava blocking rivers, Tianshan Tianchi formed by glacier transportation blocking rivers, etc. The latter is an artificial dammed lake, mainly referring to reservoirs and ponds, such as Songhua Lake, Qiandao Lake, Tianmu Lake and Taiping Lake. This artificial lake composed of green hills and majestic dams has become a tourist attraction.

3. Riparian and marine lakes: refer to lakes formed in the process of river evolution or coastal evolution. The former is Hongze Lake, Slender West Lake and Mochou Lake. The latter is actually a lagoon, such as the West Lake in Hangzhou.

In addition to the above three categories, there are glacial lakes and wind erosion lakes formed by glaciation. Because it is not widely distributed, the degree of tourism development is not enough.

Garden differences:

1. The northern garden is also a temperate garden, which is related to the grandeur, majestic momentum and royal style of the northern landscape. It has a wide range, stable architectural image and strong colors. Due to the limitation of natural conditions, rivers, lakes, boulders and evergreen trees are called few. The style is rough and euphemistic, and the overall feature is "masculinity". Most of them are concentrated in Beijing, Xi, Luoyang and Kaifeng, especially in Beijing.

2. Jiangnan gardens, also subtropical gardens, are mostly private homes with gentle and lovely flags. Elegant color, small scale, winding roads, many strange stones, beautiful water and light and high wings give people a lively sense of movement. The mountains and rivers imitate nature, and the mountains and rivers are small and large, and the stacked stones are mostly Taihu stones. The general feature is "show". Most of them are concentrated in Nanjing, Shanghai, Wuxi, Suzhou, Hangzhou, Yangzhou and other places, especially Suzhou gardens.

3. Lingnan Garden is also a tropical garden. The natural conditions of gardening are superior to those in the north and south of the Yangtze River, and it has obvious tropical characteristics. The artistic level of gardening is high, and it is often concentrated in Hushan and Guangzhou, such as Qinghui Garden in Shunde, Guangdong, Keyuan Garden in Dongguan and Yuyin Mountain House in Panyu. This kind of gardens are generally small in scale, mostly home gardens, with a large proportion of casting. The style is between the northern garden and the southern garden, and it is influenced by modern foreign gardening methods and geographical factors. The building is simple, light and beautiful, and the indoor landscaping echoes inside and outside, highlighting the architectural characteristics of the "New Lingnan" garden.