In 2003, I took a daytrip to San Marino, an independent country located on the border between the regions of Emilia-Romagna and Le Marche in Italy. San Marino is the third smallest country in Europe (Vatican City and Monaco are smaller). The three towers of San Marino are three of the most famous landmarks. These towers are located on the three peaks of Monte Titano and were originally built as look out towers to protect the tiny republic of San Marino.
The first tower ~ Guaita ~ the oldest, largest, and most famous of the three towers
The second tower ~ Cesta ~ located on the highest of Monte Titano's summits
The third tower ~ Montale ~ the smallest of the three towers, located on the smallest of Monte Titano's summits (not open to the public)