Fort Adventure

The  is a decoration that was released on June 17, 2015, along with the Level 54 content update.

Trivia

 * Only one can be purchased.
 * Fort Adventure appears in Homer's fantasy in Bart's Inner Child. After acquiring a free trampoline from Krusty, Homer imagines setting up a theme park called "Homerland" - charging $50.00 - to use the trampoline ("Trampoline World"), play in the mud ("Muckville USA), or enter Fort Adventure, a pile of used matresses.