The area of Billings to the Northeast is known as the Heights. It is geographically separated from the West end and Downtown by sandstone rock formations known as the Rimrocks or "Rims". The Heights offers both new construction and established neighborhoods as well as valley settings and views of Alkali Creek or the Yellowstone River. Billings' main event center, Metra Park, is located on the edge of the Heights. Other amenities to the Heights area include the Oasis outdoor water park, Centennial Ice Arena, Lake Hills Golf Course and Lake Elmo State Park along with restaurants and shopping.