This item is part of Count Ymir's Questline. He'll give it to you to find the Ancient Ruins of Rhia. Count Ymir will give this map to you the first time you talk to him when you reach the ...

The Map: Rauh Ruins is a Key Item introduced in Elden Ring: Shadow of the Erdtree. Map of the ancient Rauh Ruins. These giant ruins are flooded, overgrown, and split into two by a chasm.