It consists of a curving hallway with a door that leads into a chamber with three other doors. Then you enter a chamber with five doors, on the north, east, west, and south (the one you came from.) and one in the middle, containing the miniboss fight against a Stalfos. Upon beating him, you obtain the Beetle. At the end, you enter a chamber with the boss fight, against the Demon Lord Ghirahim. You then enter the Skyview Spring, and receive the Ruby Tablet, opening the portal to Eldin Volcano.