Desert Pyramid

The Desert Pyramid is a supposed dungeon found in Legend of Zelda: Ocarina of Time. Similarly to the Sky Temple, it is a rumored hidden temple that contains great treasures such as the Triforce. It was "discovered" by someone who played the Song of Storms in a specific location in the Haunted Wasteland, which would cause lightning that revealed a triangle in the distance. Despite the best efforts of many players, it could not be reached in the standard copy, and it was discovered to be just a stray polygon by investigators. However, the Desert Pyramid has appeared in several copies that have crossed over.

Methods of Access
As one would expect, the common method used to locate the Desert Pyramid is roaming the Haunted Wasteland and finding a hidden path to the pyramid. It is commonly unlocked after beating the Spirit Temple and obtaining a specific item such as the Silver or Gold Gauntlets, or the Gerudo Tunic. These would then allow you to access the path to the Desert Pyramid. Alternatively, one would have to solve some kind of puzzle or complete a task at the Spirit Temple, such as activating the glitched invisible Twinrova rematch or finding a hidden location in the temple.

Appearance & Contents
Unlike the Sky Temple's nebulous and inconsistent nature, the Desert Pyramid has a much more concrete description in the reports of it's location. It often appears extremely similar to the Spirit and Fire Temples with an extra emphasis on maze-like rooms, standard pyramid structure and Egyptian design. The puzzles are often based around the Gauntlets and Gerudo Tunic, just like the Spirit Temple, though other relevant items include the Bombchus and Hookshot. The enemies are often the same seen in the Spirit and Fire Temples, as well as Gerudo Desert as a whole, with the "Real Bombchu" enemies from Majora's Mask making cameos in some copies.

The boss of the pyramid is often said to be a rematch with Twinrova despite their death at the end of the Spirit Temple, a monster reminiscent of Dead Hand made of quicksand that attempts to pull Link into a central pit of quicksand, a stronger King Dodongo resembling the Helmasaur King from A Link to the Past, bosses from future games in the franchise such as Wind Waker's Molgera or Twilight Princess' Stallord (Notably, defeating an anomalous skeleton boss is said to be a method of unlocking the Sky Temple), or even a boss version of the Real Bombchu.

The reward for finding and clearing the temple was commonly said to be the Triforce. However, due to this dungeon's nature, this seems to be nothing but playground rumors. Other, more likely reports say that the reward for clearing it is a third tier of Gauntlet, the Gold Gauntlets (now removed from Ganon's Castle), the Gerudo Tunic, upgraded Bombchus or Bombchu capacity, or an upgraded Hookshot.

Theorizing
Despite the polygon believed to be the Desert Pyramid being nothing but misplaced geometry, several have speculated that it was the remnant of an unused location within the Haunted Wasteland, potentially just a fragment of the real Desert Pyramid, explaining it's manifestation. Like many other myths and unused content, the Desert Pyramid was said to have been moved to Ura Zelda, and coincidentally, Ura Zelda assets appear to manifest in copies that also have the Desert Pyramid, potentially backing up this theory.