$18; $10 (ages 3-11). Cash only.
Tours depart from the information booth daily at 1:30, mid-Mar. to early Oct.; Sat. at 1:30, early Jan. to mid-Mar. and late Oct.-late Dec. Tours depart from the visitor center daily at 10:30, mid-Mar. to late Oct. Tours depart from Market House Park daily at 1:30, early to mid-Oct. Phone ahead to confirm schedule.