Berlin-Ichthyosaur State Park covers 1,540 acres between 6,840 and 7,880 feet. It protects the turn-of-the-century mining town of Berlin, preserved in a state of arrested decay with original structures and a cemetery, and holds the most abundant concentration and largest known remains of ichthyosaurs, marine reptiles from 225 million years ago, displayed at the Fossil House. It became a state park in 1957. Visitors can take the self-guided Berlin townsite tour, walk a nature trail, and join seasonal Fossil House tours. The park has 14 campsites that take RVs up to 25 feet, picnic areas, and a stretch of the American Discovery Trail. Wildlife includes mule deer, jackrabbits, western bluebirds, pinyon jays, and chukar partridge. The park is open year-round, seven days a week. Fees are cash or check only.