With its pentagonal base, the ancient watch tower was rebuilt in the second half of the 15th century and since then has remained almost unchanged. Its weathered roof was built in the 16th century.

From here the panorama is fascinating. North east, the majestic walls of the Second Tower stand out in the blue sky. In the background is an impressive view of Mount Conero and of the fertile plain as far as the Adriatic coast. South, one can enjoy a view of the Apennine with Mount Carpegna. 

Ancient feudal possession of the Dukes of Montefeltro, who have always been allies of San Marino, Mount Carpegna was an area of strategic importance for mutual defence, as well as an excellent observation post over the Marecchia Valley and other possessions of the Grand Duchy of Tuscany.