There is a lavafall in Dodongo's Cavern that can be jumped through to find a secret room that contains one recovery heart. This room is unique in that the Lens of Truth does not reveal its location, suggesting that there is no known official way in-game to learn that the room exists.

Early during development, the Market was originally called "Downtown".

Originally, the player would have used an item called the Reed Whistle to call Epona. This, however, was replaced by Epona's Song. Sound Designer Koji Kondo said: "Reed music was in the initial development concept for Ocarina, but we ultimately didn't use it." This idea was later brought to The Legend of Zelda: Twilight Princess.

During E3 of 1998 Ocarina of Time's logo was the same logo as A Link to the Past. The logo was most likely a temporary placeholder during development.

During early stages of the game's development, the fence at Jabu Jabu's Belly near the entrance used to be a shortcut to the Zora's Domain entrance. The idea was cut for unknown reasons.

Taking out a Deku Stick near a group of butterflies and leading one away from the group will result in the butterfly turning into a Fairy.

In early versions of the game the shooting gallery mini game had more things Link can shoot instead of just rupees. Footage shows Link shooting bombs and other targets which are not in the final version of the game.

In early footage's of the game the spirit temple's boss door was a regular door instead of the huge designed door with a lock on it found in the final release.

Dark Link mimics all of the player's moves and actions (save for a few.) The amount of health he has also corresponds to the amount of Heart Containers the player has by the time they fight him, potentially making him very durable or quite weak.

According to an interview with Shigeru Miyamoto conducted while the game was still in development, Navi was originally intended to have romantic feelings for Link and was even jealous of Princess Zelda. Though it seems that these details were left out in the final game.

In early trailers of the game Link's bombs were slightly different. They were more round and a much darker blue.

In early versions of the game Sheik's eyes were blue, but were changed to the red in the final version.

The owl that follows Link throughout his quest Spoiler:is actually the light sage Rauru.

Epona, Link's horse, actually began as an idea discussed during development of Super Mario 64 to include a ridable horse in the game. While never included in Mario 64, the developers knew they would eventually include a horse in Ocarina of Time and planned for it from the very beginning.

A glitch called the "Wrong Warp" glitch can be used to teleport the player from the Deku Tree basement to Ganon's Tower, as well as several other locations in the game. This glitch can be used to complete the game in a very short period of time.

During development, Stalfos originally had less armor and a different sword and shield, among other minor cosmetic differences.

Zelda's Lullaby sounds extremely similar to the 1976 song "Concerto for Philodendron and Pothos" by Mort Garson.

The knight Link is fighting in the early Zelda 64 trailer uses the same texture as Metal Mario from Super Mario 64.

The bassline for the The Song of Storms sounds very similar to the bassline for the Castle Theme from Super Mario World 2: Yoshi's Island.

When the game was in later beta-stages, the buttons had different functions compared to the final release. The functions of the A and B buttons were swapped when compared to the final version; Links sword was assigned to the A button, and the B button was for action commands. Also during this period, the action-button didn't involve rolling. Instead, it was context sensitive and would trigger things like jumps in combat or get information from Navi.