San Marino is an enclave in central Italy. The third smallest state in Europe (after the Holy See and Monaco), San Marino also claims to be the world's oldest republic. According to tradition, it was founded by a Christian stonemason named Marino in A.D. 301. San Marino is a rugged area in the Apennines offering stunning views across the neighbouring countryside to Rimini and the Adriatic Sea. From here it is easy to see how this tiny republic was so defendable. Highlight of a trip to San Marino is a walk through the forest paths to the three tower fortresses that crown the peaks of Mount Titano, the castle route, and shopping in the duty-free stores.