In God of War, The Lake of Nine is east from the top of the mountain when it is West on the map and your son clearly says it is west. :
Lake Of Nine Collectibles - God Of War Ragnarok Guide
God of War Ragnarok Lake of Nine Collectible Locations
God of War Ragnarok Lake of Nine Collectible Locations
God of War Ragnarok Lake of Nine Collectible Locations
Epic and Beautiful Environments in God of War
God of War: How to Explore All the Lake of Nine Has to Offer | Push Square
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God of War Lake of Nine guides and walkthroughs - Polygon
God of War Ragnarök - Midgard Exploration Walkthrough - Neoseeker
Lake Of Nine Collectibles - God Of War Ragnarok Guide
Lake of Nine | God of War Wiki | Fandom
God of War Ragnarok Lake of Nine Collectible Locations
God of War Treasure Map guide: Dead and Bloated | VG247
Lake of Nine Buried Treasure God Of War Ragnarok All 4/4 - YouTube
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God of War Lake of Nine guides and walkthroughs - Polygon
Shores of Nine - God of War (2018) Wiki Guide - IGN
God Of War Ragnarok: Lake of Nine Artifact Locations
God of War: Ragnarok - Lake of Nine Buried Treasure, Where to find?
Guiding Light - God of War Ragnarok Wiki Guide - IGN
Lake of Nine All Collectibles Locations | God of War Ragnarok – GAMERPILLAR: FREE GAMES
Beneath The Surface Trophy (Explore Lake of Nine) - God of War (2018) - YouTube
God of War Ragnarok: All Berserker Gravestone Locations - GameSpot
What are the undiscovered collectibles in Lake of Nine in God of War Ragnarok? - Gamepur
God of War Ragnarok: Lake of Nine Collectibles | Push Square
