Hefty's gym is where Hefty does his workout exercises. It is featured mostly in the Smurf comic books and in the animated version of The Smurfs And The Magic Flute. An imagined version of the gym appears in the cartoon show special "Smurfily Ever After" while the real version appears in the episode "Little Big Smurf". It also appears in the game 'Smurfs' Village' but only the outlook is shown.