This guide shows the location of Odin’s Raven in The Oarsmen area of the Midgard Region in God of War Ragnarok. Click here to see The Oarsmen complete Collectibles Guide.
As you enter the area, you will see the Nornir Chest directly in front of you. Climb up the wall behind the chest as shown in the picture below. Then go straight ahead and you will see the raven far away, behind a giant statue as shown in the second picture below.