The River Morceaux rises in the central highlands of Bretonnia and follows a course through rolling chalk hills to its eventual destination on the west coast. The wine of the Morceaux valley is said to be the best in Bretonnia (if not the whole world). In summer, the rolling chalk hills of the area are covered with vines, the produce of which is processed locally before being sent downstream to the merchants. The Morceaux is navigable by sea vessels only as far as the city of Bordeleaux, 25 miles upriver, beyond which it incorporates a system of locks designed to permit access by barges and small craft. Although a small river compared to the Reik or even Brienne, it is still an important waterway.