Don't bother. When you buy a voucher for this place they will not tell you anywhere that they have a cap on how many people they will allow in on a voucher. So, you will then drive and waste $10 of gas, pay for parking only to arrive and be told that they have met their secret cap on vouchers but that you may purchase tickets -- even though you already purchased them. Nowhere on any voucher does it indicate a reservation is required or that or that a cap is in effect The ticket person you speak with will be highly unpleasant and provide a vapid string of excuses, and the smell adventure that ensues upon opening the door (which hits the staircase on the way in) will be almost too much for you to handle so you'll be okay to go home and get your money back.