Adventures . . Edit
Are maps with treasures at every turn. You can find them in the Forest in Fantage. To enter the Hidden Grove where you can choose a level to begin your journey, click on the blue portal in the middle of the Forest. Here, you may choose a level to play in. If you haven't ever played the Adventures, then you can only start on level 1.
Treasure Chests. . . Edit
Treasure chests can be found in any adventure. There are four types. Teal chests drop items that can only be found in the adventures. Wooden chests are normal chests which give stars and stickers. Sometimes even gems. PM chests can only be opened by Premium Members and hold stars, and gems. Purple and gold chests can only be opened with a magic key you can buy in the "shop" tab during adventures.