According to the Yellowstone National Park, the world's highest density gisara or warm springs are located. Gisara is the hot water flow caused by volcanic eruptions. About 300 Gisars have been found in the park, and the most popular among them is the Old Phaythfal. Originally, the main reason behind the development of America's first National Park Yeleston in 1872 is this Old Faithful Gisar
Old faththulf name comes from regular eruption, which occurs every 55-120 minutes and remains for 2-5 minutes. Every year, more than 35 million people rush to Yellowstone on seeing the springs of warm water caused by volcanic eruptions. So far, more than 1000000 volcanoes have been recorded in Yellowstone.