*Reservations are required. Guests must check in with our sales rep at the ticket booth 30 minutes prior to departure. Late check-in may result in forfeited reserved seat. Reservation based tickets are non-refundable. You may reschedule up to 24 hours in advance of tour time. The $5 off promotion is valid for advance bookings only. Not valid to purchase on the day of your tour. Offer may not be combined with any other promos. Other restrictions may apply. This promotion has no cash value, is not refundable, and is non-transferable. Promotion may end at any time.