This is really story related unless you're using a guide or feel like fumbling your way through a later puzzle as the actions needed for the achievement also reveal a clue for a puzzle. In Act 1 you'll come to a windmill where there's a boat keeper tied to a post and a sleeping Wakcha. You need to make your way past the Wakcha to the top of the Windmill while Teku's candle is lit. In the room at the top, use a light burst when you see the eye icon. This will reveal a mural and give you the achievement.