Brest is a port city in Brittany, in northwestern France, bisected by the Penfeld river. It’s known for its rich maritime history and naval base. At the mouth of the Penfeld, overlooking the harbor, is the National Navy Museum, housed in the medieval Château de Brest. Across the river stands Tour Tanguy, a medieval tower. To the northeast are the National Botanical Conservatory and the Océanopolis aquarium.