Lakeside Laboratory

The Lakeside Laboratory is a location in Ocarina of Time at Lake Hylia near the south of Hyrule Field. The Lake Scientist resides there and studies marine biology in his laboratory.

Biggoron's Sword

At the Lakeside Laboratory, while Link is in the midst of acquiring the Biggoron's Sword, he finds that he needs the Eyeball Frog to create Eye Drops for Biggoron. After receiving it from King Zora XVI at Zora's Domain, he must bring it to the Lake Scientist on horseback for increased speed, as the Eyeball Frog spoils quickly.

Heart Piece #27

Main article: Ocarina of Time Heart Pieces

At the very top of the Lakeside Laboratory is a Piece of Heart. To get up there, you can either plant a Magic Bean as a child and ride it as an adult or use the Scarecrow's Song and Hookshot up. Watch out for the Guays, a crow-like enemy while you're at it too.

Heart Piece #28

Main article: Ocarina of Time Heart Pieces

Once you win the Golden Scale from the Fishing Pond, you can enter the Lakeside Laboratory and use it to dive down as far as you can. Link will touch the bottom and you'll hear the Zelda chime. Swim back up and speak with Dr. Mizumi, the Lake Scientist to get a reward.