Cascades are a series of waterfalls or a flow of water over a steep surface, often creating a beautiful and dynamic natural feature. They can occur in rivers, streams, or even man-made structures, and are typically formed by the erosion of rock and soil over time. The sound of cascading water is often soothing, making these locations popular for recreation and relaxation. In geography, the term "Cascades" can also refer to the Cascade Range, a mountain range in the Pacific Northwest of the United States. This range is known for its volcanic peaks, including Mount Rainier and Mount St. Helens, and is a significant area for outdoor activities like hiking and skiing.