Do I need to pre-book with my Merlin Pass to visit The Edinburgh Dungeon? Yes - All guests, including Merlin Pass holders, must be pre-booked in advance with limited numbers available, please click here to secure now. Related articles What shows and rides are within The Edinburgh Dungeon? How do I redeem my Merlin Pass Share the Fun vouchers? Where can I find information on Merlin Passes? How many people are on each tour? Are there any restriction dates for using my Merlin Pass at The Edinburgh Dungeon?