This page explains how to find the Kaya Wan shrine and solve the " Shields from Water" puzzle.
How to Reach the Shrine
How to Solve the Shrine
Use Cryonis to make platforms in the water. Get close to the waterfall, then use Cryonis to make sideways platforms in the waterfall. Climb up those platforms to reach the upper area.
Parry with your shield to deflect the Guardian Scout's beams, or just shoot the scout with arrows.
Then use Cryonis to make a platform under the treasure chest in the water. It contains an Ancient Core.
Then use Cryonis platforms to reach the next area.
Make an ice platform under the bars on the left, then ride the wooden raft, but use Cryonis to make platforms that stop the wooden raft near the bars. Go past where you raised the bars and open the chest to get a Knight's Broadsword.
Then carefully go back to the flowing water on Cryonis platforms. Go to the end of the flowing water and float down to Kaya Wan to get the Spirit Orb.