Promotional value expires 90 days after purchase. Amount paid never expires. Limit 2 per person, may buy 2 additional as gifts. Valid only for option purchased. Online reservation required prior to arrival. The voucher is not a ticket and does not by itself guarantee admission to a tour. 72hr cancellation notice required. Subject to weather. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Exact meeting location will be provided in confirmation email, complete with your reserved date and time. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings