The area also is host to notable light effects, such as the renowned sunrises. Watching the sunrise is considered a mandatory part of visiting the area. A phenomenon known as Buddha's Light () is also well-known and, on average, Buddha's Light only appears a couple of times per month. In addition, Huangshan has multiple hot springs, most of them located at the foot of the Purple Cloud Peak. The water stays at 42 °C (107.6 °F) all year, and has a high concentration of carbonates. The waters are said to help prevent skin, joint, and nerve illness.