Unicorn Fountain

The Unicorn Fountain is a removed location originally planned to be included in Legend of Zelda: Ocarina of Time. As the name suggests, it's an area resembling the Fairy Fountains with multiple unicorn statues in the central structure. It was one of the many areas believed to appear in Ura Zelda, but it's purpose remains unknown. However, some say it contains anomalous upgrades for the player upon locating it, such as the Sword Beam, the Triforce or something that would allow the player to beat the Running Man. Like many other unused locations, crossing over can bring it back into the playable world of Ocarina of Time.

Description
The Unicorn Fountain room has a floor of white stone with water covering most of the floor. Blue and green particles surround the rest of the room, acting as a wall. In the center are 3 black pedestals with a Triforce insignia and gray, metallic unicorn heads placed on top of them, each in a different position. There is a small ring of stone connecting all 3 pedestals. In the center of this structure, the water found in the room is being emitted by a fountain, hence the name. Besides for the room's description, it is unknown what this room would have held and what purpose it would have served had it made it into the final game through normal means. Many ways to locate the Unicorn Fountain have been reported, such as finding a hole in Zora's Domain that would drop the player into this room. Some say it's a location hidden within the Sky Temple, though this is likely just the result of playground rumors. Others say it would have appeared in a removed temple or in place of a normal Fairy Fountain. However, all of these reports agree that it is in a special hidden location, likely justifying it's unique design when compared to all the other Fairy Fountains. Upon entering the room, some say that the unused blue crystalline Great Fairy model is the one that would appear in this fountain in place of the regular Great Fairies seen in the other Fairy Fountains, further setting apart the Unicorn Fountain. Like the other Great Fairies, they would refill the player's Magic Meter and health, and bestow upon them a unique ability, mimicking the events within every other Fairy Fountain. What this ability is is rather inconsistent, though the 3 most common rewards, as stated previously, are the Sword Beam, the Triforce (Likely just a playground rumor), and an item that would allow the player to beat the Running Man. However, others have said you would be taught a new song for the Ocarina, a new tunic, a new type of arrow, or even the ability to use the medals collected within the temples. Most of these do not match the other Fairy Fountain rewards, meaning they are likely fake, though due to the Unicorn Fountain's unique design, it's likely it may have had a unique reward compared to the others.

Theorizing
Many have speculated as to why the Unicorn Fountain was removed. Some say it was simply an early design for the Fairy Fountains which was later decided against, likely alongside the unused Great Fairy model previously mentioned. However, others say it would hold a greater purpose as a final Fairy Fountain, either within Ganon's castle or some other location unlocked afterwards, giving the player a final, special reward that was removed for one reason or another, possibly alongside this scrapped "true final dungeon".