If it is the smallest national park in the United States, it should be the smallest national park in the United States. Most of the tourists here are admired by the hot springs, and the water in the bathroom in the park is also derived from the pure ecological hot spring water outside the park. It is said that the hot spring water here can be used to treat rheumatism diseases and other medicinal effects, and the unique rocks and algae of the hot spring mouth are also a big point.