This voucher is good for one tour on the date of your choice. The tour runs every Friday and Saturday at 7:00pm. You must use this voucher by December 31, 2014. Children ages 6 and younger do not require a ticket. Anyone under the age of 18 without a parent or guardian present must have a signed note giving them permission to take part. Tour size is limited to 20 people maximum. Tour length is 2 hours, and includes a lot of walking.