Forte Puin, Defensive fort on Monte Peralto, Genoa, Italy.

Forte Puin is a defensive structure on Monte Peralto in Genoa featuring a two-story central tower and three underground storerooms built into the ground. The entire fortification is surrounded by a protective ditch with a drawbridge that provides access to the interior spaces.

Forte Puin was designed in 1815 by engineers of the Royal Corps of the Sardinian Engineers to fill the gap on the ridge between Forte Sperone and Forte Diamante, together with Forte Fratello Minore and Forte Fratello Maggiore. Work began in 1815 with the central tower; the surrounding protective wall was started three years later and finished in 1828, and the works ended in 1830. The fort was abandoned in the last decade of the 19th century and struck from the military lists in 1908.

The fort's name reflects its role in Genoa's military defense network that developed over the 19th century. Today visitors can walk through the structure and understand how it functioned as part of a larger system that protected the city.

The fort opens to visitors on Sundays and is reached via Via delle Baracche in Genoa's northern area. The location sits on a hillside, so visitors should expect walking paths to explore the different sections of the site.

The fort was struck from the military lists in 1908 and lay abandoned for decades. In 1963 the private citizen Fausto Parodi obtained it on concession, restored it at his own expense and lived there for about twenty years. The 1960s work also added a partition in the north room, new iron grilles and toilets.