Promotional value expires 120 days after purchase. Amount paid never expires. 72-hour cancellation notice required. Reservation required. Not valid on April 14, 21, and 28. Tours are offered every Sunday. Minimum number of guests required for tour to be held. Merchant's standard cancellation policy applies (any fees not to exceed voucher price). Limit 1 per person, may buy 1 additional as gift(s). May be repurchased every 180 days. Valid only for option purchased. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.