If you find the A Pirate’s Adventure building between Adventureland and Frontierland, you can go on a number of different treasure hunts that will take you all over Aventureland.
A Pirate’s Adventure: There is one way to get a specific FastPass without booking it online.
If you complete three of the treasure hunts you’ll actually be given a FastPass for Pirates of the Caribbean.
They’re full of fun interactive elements and and are a great way to spend down time.