Centennial Hall Museum is a historic landmark in Valentine, Nebraska, built in 1897 as the city's first high school. Now the oldest standing high school building in Nebraska, the museum houses twelve rooms of area historical artifacts, including the Hallock Bell collection featuring over 1,700 bells, a Days of Yesteryear room, and a Military room. Open Memorial Day through Labor Day, Thursday through Saturday, 1 to 5 p.m., or by appointment.