$15; free (ages 0-15 when accompanied by a paying adult). Tickets are valid for 7 consecutive days.
Daily 8:45-5:15. Grounds are open daily 5:30 a.m.-midnight. Last ticket is sold 15 minutes before closing. Historic weapons demonstration Fri.-Sun. at 10:30, 11:30, 1:30, 2:30 and 3:30 (weather permitting); phone ahead to confirm schedule. Closed Thanksgiving and Christmas.