3902 Davenport Street - Joslyn Castle is on the National Register of Historic Places and is the local landmark and first historic site of the Nebraska Statewide Arboretum. This 35-room, 20,000 sq. ft. home built in 1903 was designed by architect John McDonald and sits on 5.5 acres of ground. Public tours available on Sundays at 1, 2, and 3, Mondays at 10:30, 11:30, and 12:30, and Thursdays at 2. Groups by appointment. 402-595-2199