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The scorched earth map for Ark Survival Evolved only has 3 caves.
Each contains one of the artifacts necessary to enter the boss arena. You will need one of each to summon the boss.
Grave Of The Tyrants Cave Entrance: Lat 28.4 Lon 29.2
Contains the Artifact of the Crag.
The Old Tunnels Cave Entrance: Lat 58.5 Lon 47.7
Contains The Artifact of the Gatekeeper.
Ruins Of Nosti Cave Entrance: Lat 78.5 Lon 75.5
Contains The Artifact of the Destroyer.