Overlook the whole harbour from this large terrace. You'll see the entire length of the submarine base and docks used for shipbuilding.
More information at saint-nazaire-tourisme.com http://www.saint-nazaire-tourisme.com/page_n3/148/188/une-terrasse-pour-finir-en-beaute.html
Address 2 Avenue des Frégates, Saint-Nazaire 44600, France
Coordinates 47°16'33.316" N -2°11'57.203" E