Visitor center and self-guiding tour free. Guided tour $5; free (ages 0-20).
Visitor center Sun.-Thurs. 11-7, Fri.-Sat. 10-8. Self-guiding tours are available Mon.-Tues. 10-2, Wed.-Thurs. and Sun. 10-1. Guided tours are given every 30 minutes Wed.-Thurs. and Sun. 2-3, Fri. 1-3, Sat. 10:30-3. Closed major holidays. Phone ahead to confirm schedule.