Hole of Z

The Hole of Z is a location from The Legend of Zelda: Ocarina of Time. Located within the Forest Training Center area, the Hole of Z is a tiny hole that Link can crawl through. When Link does this, he finds himeself in a maze-like area with a giant boulder rolling around within it. If Link can avoid the boulder and reach the Treasure Chest on the other side of the maze, he will obtain the Kokiri Sword.

In The Legend of Zelda: Collector's Edition, the Hole of Z is renamed the Hole of L.

Etymology
The Hole of Z is named after the button on the Nintendo 64 controller that is used to enter the hole. This makes sense since the Hole of Z is traversed in the beginning of the game, when the controls are still being taught to the player.