Guaita

Guaita is one of three peaks which overlooks the city of San Marino, the capital of San Marino. The other two are De La Fratta and Montale.
Fortress of Guaita.
The Guaita fortress is the oldest of the three towers constructed on Monte Titano, and the most famous. It was built in the 11th century and served briefly as a prison. It is one of the three towers depicted on both the national flag and coat of arms. It was registered as one of the World Heritage Sites in 2008.