$19.95; $15.95 (ages 62+); $13.95 (students and military with ID); free (ages 0-14 with adult and to all first Thurs. of the month).
$5 at Westlake Avenue N. garage or Associated General Contractors building (with validation).
Daily 10-5 (also first Thurs. of the month 5-8). Closed Thanksgiving and Christmas. Phone ahead to confirm schedule.