So you are on your way to Mount Kolts.

There are some things you should not miss. I will tell you about a bunch of them now.

Do not open every single treasure chest. The content of some chests is changing. One of the chests in the cave can be quite helpful later because the treasure turns into a Lightning Rod and you can defeat the next boss (the second time you are in the cave) by just throwing the rod at him and end the battle immediately.

In (SPOILER)Returner's Hideout you can decide, which gift you want, depending on how you tell Banon, you will help him. It can be a Genji Glove or a Gauntlet.

In the (SPOILER)Cave to the Sealed Gate you can use some switches to open a secret cave. There you will find one of two "AtmaWeapon" (Ultima Weapon) items.