Mesa is a desert city east of Phoenix in the Salt River Valley, with museums, arts, and spring training baseball. The Arizona Museum of Natural History explores dinosaurs, ancient cultures, and Arizona geology, the Mesa Arts Center gathers theaters, galleries, and studios in downtown Mesa, and the i.d.e.a. Museum offers hands on art experiences for children. Sloan Park hosts Chicago Cubs spring training, Hohokam Stadium hosts Oakland Athletics spring training, and Usery Mountain Regional Park offers desert trails and views east of the city.