Do we need to buy tickets ahead of time, or can we buy them when we arrive?

Patrick, you can buy the tickets when you arrive. You should understand that the slide can't you take you to the top. You need to take the cable car up and get down by slide. The tickets for the wall, cable car and slide are sold separately. If you want, you can do te slide twice. I think you can climb the wall first and then slide to get down. Then you can take the cable car up and slide down.