The Museu Militar do Porto, or the Military Museum of Porto, is a free museum that showcases the military history of Porto and Portugal. It is located in the historic center of Porto and features a collection of weapons, uniforms, and artifacts from various periods of Portuguese military history. Visitors can learn about the country's involvement in wars and conflicts, as well as the evolution of military technology. The Museu Militar do Porto offers a unique perspective on the city's history and is a must-visit for history enthusiasts and military buffs.