Devil's Bath is a natural phenomenon located in the Bruce Peninsula National Park in Ontario, Canada. It is a small, circular pool of water that has a bright green hue, caused by the high concentration of dissolved minerals in the water. The pool is fed by a small stream, and it is surrounded by rocky cliffs and lush vegetation. Visitors can access the Devil's Bath by hiking a trail through the park, which leads to a viewing platform overlooking the pool. Swimming in the Devil's Bath is prohibited, as the water is stagnant and potentially harmful to human health. However, the pool remains a popular destination for hikers and nature enthusiasts who are drawn to its unique color and the natural beauty of the surrounding area.