Eleanor Uziron Achievement in Vampire Survivors

Like all coffins, this one is marked on your map with a question mark, in the northwest of the map. To reach it, head northwest and you'll eventually reach a lake. Head east along the lake shore until you get to a path you can take north that cuts back to the west. Here, you can head straight to the coffin. Like all coffins, get near it to trigger all the enemies around it, then kill them all and walk over the coffin to open it, unlocking this achievement and the new character with the same name.