*Reservations are required. Please check in with our sales rep at the ticket booth 20 minutes prior to tour. Allow additional 20 minutes for Parking. Late check-in may result in a forfeited reservation. You may reschedule up to 24 hours in advance of tour time by calling 619-298-8687. Reservation based tickets are non-refundable. No on-site refunds allowed. This tour may not be suitable for children under 13 years of age. Please note that a significant amount of this tour requires traversing over uneven grounds and also includes historic sites and buildings with no wheelchair accessibility in poorly lit areas. Wear comfortable shoes or you will be dead on your feet.