Go City Cards are multi-attraction passes. What does that mean? Well, it works like this: You purchase a pass for the destination you are going to visit, using the website or the app. You don't even have to print you Go City Pass, you can just use the app that you can show at the gate. You can use the pass within 30 days after your first attraction visit, and if you don't use your pass you can return it for a full refund, up to a year after its purchase. Try it out: you got nothing to lose, and only to save!