$15; $12 (ages 62+, military with ID or students with ID); free (ages 0-16); free (active military and their immediate family, Memorial Day-Labor Day). Audio tour additional $3. Rates may vary; phone ahead.
Daily 10-6, July-Aug.; 10-5, rest of year. Guided tours daily at 11 and 2, June-Sept.; Sat.-Sun. at 11 and 2, in May and Oct.