Free Optional Tour promotion is valid for the first 100 customers making a new reservation between 5/16/19 and 5/22/19 for a 2019 departure date. Free Optional Tour is provided in the form of an American Express® Gift Card valued at $100 USD and will be mailed approximately 7 days prior to departure if customer is paid-in-full. Customer must mention the Free Optional Tour promotion when making a reservation in order to receive the $100 American Express® Gift Card. Promotion is only valid on tours listed on the Free Optional Tour Promotion page. Most Optional Tours are paid in destination while on the tour. Not all optional tours can be paid by American Express® Gift Card and may need to be paid by cash or other method. Maximum value of this promotion is $100 USD per person regardless of selected optional tour(s) in destination. Promotion is not valid on tours booked prior to 5/16/19. Promotion is accurate at the time of sending and is subject to change.