Wikipedia EN Canal de Nantes à Brest
The Nantes–Brest canal (French: Canal de Nantes à Brest, pronounced [kanal də nɑ̃t a bʁɛst]; Breton: Kanol Naoned-Brest) is a canal linking the two seaports of Nantes and Brest through inland Brittany. It was built in the early 19th century, with a total length of 385 km with 238 locks.
Source: Wikipedia https://en.wikipedia.org/wiki/Nantes–Brest_canal