Location from adventure-time by
Marceline's home — a large natural cave decorated like a musician's living space, draped in instruments, amps, and the accumulated possessions of a thousand-year life.
Marceline's cave is the physical expression of her personality: something that looks chaotic but is deeply organized around what she loves. Every instrument has a place. Every journal has a shelf. The cave goes back further than visitors ever explore, and deeper passages likely contain the artifacts of centuries she's mostly stopped talking about. It's close enough to the Grasslands to be accessible to Finn and Jake but isolated enough that she has genuine privacy. The Candy Kingdom is visible from the cave entrance on clear days.
A cavernous natural cave with a roughly circular main chamber, stone walls hung with electric guitars, amps, and vintage posters. The furniture is mismatched but comfortable: old couches, a worn coffee table, bookshelves with journals going back centuries. Glow-in-the-dark mushrooms light the deeper passages. It smells like old books and guitar strings.
Also known as: Marceline's Cave, Marceline's House, The Cave House