San Marino is the capital of the Republic of San Marino, a small independent country surrounded by Italian territory. The city, atop rugged Mount Titano, is known for its medieval old town and cobblestone streets. On the mountain’s eastern ridge, a path links 3 towers, part of the city’s ancient defensive system. These include the Castello della Guaita, a small fortress with crenellated walls enclosing a watchtower.
Wikipedia

San Marino is a mountainous microstate surrounded by north-central Italy. Among the world’s oldest republics, it retains much of its historic architecture. On the slopes of Monte Titano sits the capital, also called San Marino, known for its medieval walled old town and narrow cobblestone streets. The Three Towers, castlelike citadels dating to the 11th century, sit atop Titano’s neighboring peaks.
Wikipedia