Caves of Syany
Caves of Syany is a system of artificial caves and quarries from the Novlenskiye Caves group near Moscow. Syany are located 40 km south of Moscow, near the village of Starosyanovo and are considered one of the largest known ancient systems on the territory of the Russian Federation, the largest in the Moscow region. According to researchers who have visited here in different years, the length of the caves is about 20 kilometers.
