Key Cavern is the third dungeon in The Legend of Zelda: Link's Awakening. It is so named for the shapes of its two floors, which resemble a Nightmare Key and a Small Key, and for the abundance of keys found in the dungeon. In fact, it is possible to clear the dungeon with one Small Key remaining, a rare occurrence in the Legend of Zelda series. Were the dungeon not designed this way, Link could become permanently unable to progress were he to unlock the doors in the wrong order. Thus each locked door has a key hidden in the area it bars, so that Link is always able to access at least one key and progress though the dungeon.