Hours: Grounds open daily 7-4:15, mid-Aug. to mid-May; Fri.-Mon. 7-4:15, rest of year. House Tour departs daily on the hour 9-4, mid-Feb. to mid-Apr.; Fri.-Mon. at 11, noon and 2, mid-May to mid-Aug.; hours vary rest of year. Underground Tour departs daily, Nov.-Apr. (based on staff availability). Phone ahead to confirm schedule.