There are two ways to get to the DLC area for Dark Souls 3: The Ringed City.
If you have completed Ashes of Ariandel, a bonfire will appear in the back of the Father Ariandel boss room if you have beaten him and Sister Friede, and have talked to The Painter in the attic of the chapel.
If you have not completed Ashes of Ariandel or do not have Ashes of Ariandel, a bonfire will appear at the final bonfire at the Kiln of the First Flame before the Soul of Cinder boss fight.
Good luck!
Inspired by the beauty of the natural world around us, Everwild is a brand-new game in development from Rare where unique and unforgettable experiences await in a natural and magical world. Play as an Eternal as you explore and build bonds with the world around you.