The Nirvata Lake is a location found in Breath of the Wild.
Breath of the Wild
The Nirvata Lake is located northwest of Hateno Village and northeast of the Hateno Tower. There is a decent sized lake on a higher elevation, near the Nirvata Plateau and water flows down a waterfall into the main part of the lake. At the very south end of the lake, there is a Raft that can be used to navigate across the water.
There are a series of treasure chests found within the lake. Near the raft there is a metallic treasure chest underwater that contains an Opal gem. Just north of this chest there is a floating wooden treasure chest that contains ten Arrows. Near the center of the lake there is another wooden treasure chest that contains an Amber gem. Just north of that there is a second metallic treasure chest underwater that has a Purple Rupee.
In the water there is a variety of fish, including Hyrule Bass, Staminoka Bass, Mighty Carp, and Armored Carp, as well as some Hot-Footed Frogs that are hopping around. There is also an enemy Water Octorok that will attack Link when he comes near.
At the north end of the lake there is a circle of lilypads that can be jumped into to get a Korok Seed. There is another set of lilypads in the water at the top of the waterfall where a second Korok can be found. Just east of the waterfall there is a trio of Apple trees and if Link matches the trees so that they look identical, Link can find another Korok Seed.
Nearby Korok Seeds
Jump or dive into the ring of flowers. The Cryonis rune can help.