Promotional value expires Mar 31, 2014. Amount paid never expires. Limit 4 per person, may buy 4 additional as gifts. Reservations required; subject to availability. Reservations are non-refundable, non-exchangeable; merchant's standard cancellation policy applies (any fees not to exceed Groupon price.) Tax and gratuity are not included; 9.5% tax per voucher collected prior to tour. Seating is assigned; groups must book together to sit together. Must use promotional value in 1 visit. Cannot be combined with any other offer or promotion. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings