Yes, vouchers must be redeemed online in advance. Vouchers are not able to be redeemed on the day of your visit, either online or at the attraction. If your chosen day isn't able to be selected when booking, your voucher is either not valid on that specific day or is fully booked.
Please note all promotional tickets must be pre-booked to guarantee entry. All promotional offers are also subject to availability and Terms and Conditions apply. Check the voucher for further details and restrictions.