The Western Science Center (WSC), formerly the Western Center for Archaeology & Paleontology, is a museum located near Diamond Valley Lake in Hemet, California. The WSC is home to a large collection of Native American artifacts and Ice Age fossils that were unearthed at Diamond Valley Lake, including "Max", the largest mastodon found in the western United States, and "Xena", a Columbian mammoth, as well as dinosaur fossils recovered from New Mexico.

Diamond Valley Lake is a man-made off-stream reservoir located near Hemet, California, United States. It is one of the largest reservoirs in Southern California and one of the newest. It has a capacity of 800,000 acre-feet (990,000,000 m3). The lake nearly doubled the area's surface water storage capacity and provides additional water supplies for drought, peak summer, and emergency needs.