Hours: Museum center Mon.-Sat. 9-5, Sun. noon-5. Guided walking tours are offered Mon.-Sat. at 11 and 2, Sun. at 2, Memorial Day weekend-Labor Day; Sat. at 11 and 2, Sun. at 2, day after Labor Day to mid-Oct. Closed holidays except Memorial Day, July 4 and Labor Day. Tours are given based on staff availability; phone ahead. Allow 2 hours minimum.