Fort Lupin - Credit: Wikimedia Commons
Fort Lupin, also known as Fort de la Charente, is an artillery battery in Saint-Nazaire-sur-Charente, in the department of Charente-Maritime, France. It was built in the 1680s to a design by Sébastien Le Prestre de Vauban, and it is now in good condition. Read more on Wikipedia
Source: en.wikipedia.org