located_in Italian Peninsula San Marino A country in the Apennine Mountains. It is a landlocked enclave, completely surrounded by Italy. San Marino is an enclave in Italy, on the border between the regioni of Emilia Romagna and Marche. Its topography is dominated by the Apennines mountain range. San Marino is divided into nine municipalities, known locally as Castelli (singular castello). GAZ GAZ:00003102 GAZ:00003102 ISO3166-1:674 ISO3166-1:SM ISO3166-1:SMR ISO3166-2:SM Most Serene Republic of San Marino Serenissima Repubblica di San Marino Italian Peninsula San Marino A country in the Apennine Mountains. It is a landlocked enclave, completely surrounded by Italy. San Marino is an enclave in Italy, on the border between the regioni of Emilia Romagna and Marche. Its topography is dominated by the Apennines mountain range. San Marino is divided into nine municipalities, known locally as Castelli (singular castello). GAZ GAZ:00003102 GAZ:00003102 ISO3166-1:674 ISO3166-1:SM ISO3166-1:SMR ISO3166-2:SM Most Serene Republic of San Marino Serenissima Repubblica di San Marino