Free. Reservations are required for guided tours.
Exhibit center Mon.-Sat. 10-4:30, July-Aug.; Mon., Wed. and Fri.-Sat. 11-4, in June and Sept.; Mon., Wed. and Fri. 11-4, in May; Mon., Wed. and Fri. 11-3, Oct. 1-Columbus Day. Guided tours are given Mon.-Fri. at 1 and 2, late June-late Aug. Phone ahead to confirm schedule. Allow 1 hour, 30 minutes minimum.