The Zelkoa Pond is a location from Breath of the Wild.
The Pond is located directly north of Hateno Village, with water from the Pond flowing southward into the narrow rivers of the village. While the pond mostly consists of Armored Carp, there are also some Hyrule Bass that will occasionally appear. Just south of the pond on the land, there is a Rusty Broadsword on the floor near an unlit lantern.
Just to the west of the Pond, the Ancient Furnace is located, which plays an important role in the Locked Mementos main quest. Link will need to get a Blue Flame from the furnace and use it to light the furnace that is located outside the Hateno Ancient Tech Lab. While carrying the flame, Link can travel through town, or travel north, around the Zelkoa Pond, before then heading east to the tech lab.
A very large tree overhands the Zelkoa Pond to the north. At the very top of the tree, Link can lift up a rock to find a Korok Seed.
Nearby Shrine Quests
Nearby Korok Seeds
This seed starts at a seed platform next to the tree on the peak to the east of this location. Start the race, then quickly glide and climb over to the closer tree. Climb to the very top of this tree, and then glide to the ring to get the seed. Cold Resistance Level 2 is needed to survive the temperature.
Climb up the tree and lift the rock.