At L'Isle-sur-Serein, the river divides to encircle the tranquil little town and the ruins of its 15th-century chateau.
The river meets back up after separating around the town.
mnli hypothesis: The river meets back up after separating around the town. premise: At L'Isle-sur-Serein, the river divides to encircle the tranquil little town and the ruins of its 15th-century chateau.