Ultrahand

You will need to use Ultrahand to create a platform across to this island. For instance, you can attach the two floating platforms found nearby and then use a crate to climb on top.

Use Ultrahand to create a boat to sail over the lake to reach the shrine. You will need logs and some sails that can be found nearby.

Use the Ultrahand ability to craft a fanboat. Hit the fans to power them up to propel yourself across the water here.

Use the provided boat with the sail, attach two fans with Ultrahand and then set it in the water with the Korok on top off this jetty to avoid the fast flowing water. Direct it towards the island with the other Korok.

Build a little raft or platform to stand on (or use a Zonai platform) to retrieve the bottle with Ultrahand. Drop it at the feet of Koyin to complete the quest.

After going through the front gate, keep an eye for a doorway along the wall on the right, before reaching the First Gatehouse.

There will be some iron gates blocking the way, but you can lift them up with Ultrahand.

Use Ultrahand to lift up the iron gates.

Iron gate barring entry to the Lockup.

Lift it up with Ultrahand, then dash in before it falls down.

Inside Lower Spectacle Rock Cave.

Use Ultrahand to move the boulders out of the way, revealing a hole in the ground.