Ancient Cistern

The Ancient Cistern is the fourth dungeon on The Surface from 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 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 floors of the dungeon are contrasted by the lower floor, a dark and ghastly place filled with Cursed Bokoblins.

Items

 * Whip
 * Heart Container

Enemies

 * Bokoblin
 * Cursed Bokoblin
 * Deku Baba
 * Fire Keese
 * Froak
 * Furnix
 * Green ChuChu
 * Quadro Baba
 * Skulltula
 * Walltula

Mini-boss

 * Stalmaster

Boss

 * Koloktos

Theory
The dungeon's motif appears to be based off the Japanese Tale, The Spider's Thread in which a crimal tries to escape hell through a spider's thread a Buddha hangs from paradise.