Satori Mountain (Lord of the Mountain)
Visit Satori Mountain (west of Hyrule Ridge) at night when it glows. You might encounter the Lord of the Mountain, a majestic glowing steed. You can attempt to tame and ride it, but it cannot be registered at a stable.
Eventide Island
A unique challenge island in the far southeast. Upon landing, all your equipment is removed, and you must survive using only what you find. Completing the Shrine Quest here is very rewarding.
The Secret Club (Gerudo Town)
There's a secret club in Gerudo Town that sells unique armor. You need to find a hidden entrance and solve a small puzzle to get in. It sells the Radiant Set and Desert Voe Set.
Developer Room (Unreachable)
While not directly accessible in-game, data miners have found remnants of a developer room within the game files, showcasing early concepts and assets.
Ocarina of Time References
Many locations, like Lon Lon Ranch ruins, and character names are direct references to previous Zelda titles, particularly Ocarina of Time.