The Ancient Cistern (古の大石窟 Inishie no Daisekkutsu?, Ancient Stone Cavern) is the fourth dungeon of The Legend of Zelda: Skyward Sword, and serves as the "water-themed" dungeon for the title. It is in this dungeon that Link faces Koloktos and obtains the Whip. It also houses Farore's Flame. It is designed to greatly resemble a Buddhist temple, sharing similar designs and motifs (the main statue resembling a Buddharūpa, as well as the lotus flowers scattered throughout). The rather elegant upper floor of the dungeon is contrasted by the lower floor, a dark and ghastly place filled with Cursed Bokoblins. Purified water is released into the upper area of the facility, while the filtered impurities are processed in the lower area.