What are the famous hot springs in the world? How many are there in China?

The seven most famous hot springs in the world were not violently launched in China, but rushed out of the earth's crust, thus forming hot springs. Some of them were formed by violent volcanic activities 20 million and 45 million years ago, and the highest temperature can reach 350℃. They are distributed in every corner of the earth, every continent and even the ocean. Let's walk into the seven most famous hot springs on earth. 1. Grand Prism Hot Spring: The largest hot spring in the United States is located in the Grand Prism Hot Spring in Yellowstone National Park, which is the largest hot spring in the United States and the third largest in the world. The width is about 75 to 9 1 m and the depth is 49 meters. Every minute, about 2000 liters of groundwater will gush out, and the temperature is about 7 1℃. The beauty of the big prism hot spring is that the color of the lake changes with the seasons. In spring, the lake changes from green to bright orange. This is because microorganisms such as algae and bacteria containing pigments live in mineral-rich water, and the ratio of chlorophyll and carotenoids in their bodies changes with the seasons, so the water body presents different colors. In summer, the chlorophyll content is relatively low, showing orange, red or yellow. But in winter, due to insufficient light, these microorganisms will produce more chlorophyll to inhibit the color of carotenoids, so the water they see is dark green. 2. Mammoth Hot Spring: The world's largest carbonate hot spring is also located in Mammoth Hot Spring in Yellowstone National Park, USA, which is the largest carbonate hot spring in the world. Its most striking feature is Minerva Terrace, which is a series of terraces formed by the cooling and precipitation of hot spring water for thousands of years. More than two tons of groundwater flows into Mammos every year. One of the main factors of terrace formation is calcium carbonate. Millions of years ago, the sea water at the bottom of Mammos area left thick precipitated limestone here. When the high-temperature acidic solution flows through the rock stratum and reaches the surface of the hot spring, a large amount of precipitated limestone is dissolved. Once in contact with air, some carbon dioxide in the solution will volatilize from the solution. At the same time, solid minerals formed and eventually precipitated in the form of travertine, forming terraces. 3. Blood Pool Hot Spring: The Call of Hell Blood Pool Hot Spring is a famous "hell" hot spring in Beppu, Japan (Japanese is jigoku, meaning eighteen layers of hell). Its spectacular sight makes people who come here stop to enjoy it and forget that it is a bathing place. It is not difficult to find its strangeness from the picture, that is, the blood-red spring water is like an imaginary scene of hell, and this red color is all because the water is rich in iron. 4. Blue lagoon: Iceland's sanatorium, the blue lagoon geothermal hot spring, is located in the southwest of Iceland, about 39 kilometers away from Reykjavik, the capital, and is one of the largest tourist attractions in Iceland. The Blue Lagoon is located in one of the areas with the most frequent underground magmatic activities on the earth. It heats the Blue Lagoon and makes the water transpiration. The steam heated by the lava flow near the ground is used to drive the turbine to generate electricity, and the steam passing through the turbine becomes hot water, and then the heat exchanger provides heat for the municipal hot water heating system. The average water temperature in the blue lagoon for bathing and swimming is about 40℃, and the water body is rich in minerals, such as silicon and sulfur. Soaking in the hot springs of the blue lagoon can help treat some skin diseases, such as psoriasis. 5. Glenwood Hot Springs: Glenwood Hot Springs is the largest natural hot spring swimming pool in the world, located in Colorado, USA. It has the largest natural hot spring swimming pool in the world, and the underground spring flow is 1.43 liters/second. You can soak in the treatment pool rich in salt and minerals at about 40℃ to relieve the fatigue of work, or you can swim in the swimming pool with a water temperature of 36℃ for a while, which will have a good feeling. 6. Hell Valley Hot Springs: Jigokudani Hot Springs, a Japanese snow monkey sanatorium, is famous for the Japanese snow monkeys who live here. Like people, they also like to soak in hot springs. There is only one hot spring for monkeys in the world. According to legend, the present Hell Ancient Wild Ape Park originated from Yokogawa Valley in Shiga Plateau, a national park in Shinetsu Plateau. Because of the steep cliffs there, there are hot springs everywhere. When the ancients saw this situation, they called it "Hell Valley". Unexpectedly, it became a paradise for wild monkeys. 7. Delta Tuhefei Hot Spring: the fastest hot spring in Europe. Deildartunguhver in Reykjavik is the largest hot spring in Iceland, with the highest water temperature of 97℃. At the same time, it is also famous for its rapid water flow, reaching 180 liter/s, making it the fastest hot spring in Europe. Part of its water is used for heating Bo Garnes, 34 kilometers away, and Akram, 64 kilometers away.