Forte del Pozzarello, Military fort in Monte Argentario, Italy

Forte del Pozzarello is a military fort on Monte Argentario with a trapezoidal shape and four exterior walls standing on elevated terrain near Porto Santo Stefano. Deep defensive ditches surround the structure to reinforce its protection against attack.

The fort was built between 1874 and 1888 under the Kingdom of Italy to protect the coastline in this region. It was constructed during a time when Italy was modernizing and strengthening its defensive structures.

The fort's name comes from the Pozzarello height it occupies above the northern Argentario coast. Its trapezoidal plan, deep ditches and loopholed walls follow nineteenth-century Piedmontese military practice, and the small sentry boxes (garitte) along the ramparts were used during defence exercises. The double round-arched gate pierces the full thickness of one curtain wall.

The fort stands on the summit of the Pozzarello hill and is hidden from both the sea and the coastal road to Porto Santo Stefano. It has been abandoned since 1975 and is decaying, so the masonry, ditches and stepped ramp are uneven underfoot. There is no visitor infrastructure: no signs, no marked route and no staff on site.

The fort contains multiple underground levels that served as shelter spaces, connected by passages tunneled through the thick outer walls. These hidden rooms show how defenders sought safety and refuge even beneath the ground.