Water Temple

The Water Temple is arguably the most infamous dungeon in all of The Legend of Zelda series. It was featured in The Legend of Zelda: Ocarina of Time and is known for its immense challenge - being considered by many as the most challenging dungeon in all of the franchise. Using the Zora's Tunic is a requirement in this dungeon, as many of the segments make Link go underwater for quite some time. The Iron Boots are needed to actually enter the stage, and using both of these items together will allow the player to walk on the bottom of the water for as long as you want. You'll be required to play Zelda's Lullaby throughout the stage on multiple occasions using the Ocarina.

First time players often quit playing the video game after attempting to conquer the dungeon and ultimately failing to do so. It's incredibly long length, troubling puzzles coupled with the fact that the player can become permanently stuck, requiring them to either start the entire dungeon or even the entire game over (depending on where this occurred in the temple), has caused it to become one of the most famous areas in the entire game. Water temples have been a prominent feature in many Zelda titles, though games released after this have unarguably never featured one so challenging.

Apparently, this temple, which is featured in Lake Hylia, is a tribute to Lord Jabu-Jabu. The Lakebead Temple featured in The Legend of Zelda: Twilight Princess, seemingly is placed in the same spot as the Water Temple, albeit the difficulty level has been considerably toned down.