Do Season Passholders or Merlin Annual Passholders get any discount for Tree Top Quest? There are not any discounts available for Tree Top Quest for Season Passholders or Merlin Annual Passholders. You can book your tickets to enjoy the experience here. Related articles What is Tree Top Quest? Can I leave Alton Towers Resort and re-enter the same day? How do I book Tree Top Quest? Do I need to book an entry time for the Alton Towers Dungeon? Does my Merlin Annual Pass/Merlin Monthly Membership allow me entry into the Alton Towers Dungeon?