Mars

Mars is a location from the Animated Short, Adventure Time. When Pen (later changed to Finn) gets frozen by one of Ice King's frozen lightning bolts, his mind gets transported back in time and to Mars by Abraham Lincoln, who gives him the courage to believe in himself. Earth appears normal in the background, which is explained by the fact that this scene takes place "back in time."

In "Too Young," Peppermint Butler tells the Earl of Lemongrab that "food comes from Mars." However, before he can explain further, Lemongrab silences him.

An upcoming episode will reveal a "deity" named Grob Gob Glob Grod, who comes from Mars.