My dad needs directions to the Gaulder's resting place for the final part of the Gaulder amulet quest. Where is it and how do you get there?

Are we talking about the last piece? or where you take all the pieces?

Where you take all the pieces.

Does he have the quest active? The game should mark it on his map and HUD.

As for directions, sorry but I can't be that specific (it was a while ago for me). It is east of Markarth, below a waterfall.

One of the amulet fragments are in Saarthal or whatever it's called. You have to have a key to enter and you can get the key from a quest in the College of Winterhold story.

You find a book in one of the dungeons.
I think the first one.
I forget what it is called, but its the something legend or something.
Anyway, in that book you can read the final resting place of this Gauldur fella.

Thanks for the directions, he found it.