Hyrule Forest Park
The Hyrule Forest Park is located just east of Hyrule Castle on the East Hyrule Castle island. The park is found on the west side of the island, with its main feature being a small fountain. Link can lift up a rock on top of the fountain to find a Korok Seed.
It is a rather dangerous area to be as there are is a Guardian Stalker that patrols the area, as well as an enemy Stalnox just to the east. The east side of the park is a more wooded area with a variety of animal life including some Woodland Boar, Mountain Buck, and a Grassland Fox.
Nearby Korok Seeds
Pick up the rock on top of the fountain.
Destroy the acorn.