San Leo, a stunning medieval village perched on a rocky spur in the province of Rimini, Italy, is dominated by the imposing Rocca Malatestiana, a fortress with a rich and often dark history, famously used as a prison by the notorious Count of Cagliostro. Visitors can explore the fortress, the Cathedral of San Leo, and enjoy breathtaking panoramic views of the Valmarecchia. The town also hosts various historical reenactments and cultural events throughout the year, making it a fascinating destination for history enthusiasts and sightseers alike.