San Martín de Zar
San Martín de Zar or San Martín Zar is a hamlet and minor local entity located in the municipality of Condado de Treviño, in Burgos province, Castile and León, Spain. As of 2020, it has a population of 5. Geography 
San Martín de Zar is located 110 km east-northeast of Burgos. References

Populated places in the Province of Burgos