Promotional value expires 120 days after purchase. Amount paid never expires. May be repurchased every 90 days. Reservation required. Merchant's standard cancellation policy applies (any fees not to exceed Groupon price). Limit 1 per person. Limit 1 per visit. Valid only for option purchased. Must be 21 or older with valid ID to consume alcohol; I.D.s will be checked for anyone consuming alcohol. Must arrive no later than 5 minutes prior to start of tour. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.