entrance to the tunnels, old abandoned quarry mines near the city of sataniv, ukraine. autumn day. stones and wood

underground cave entrance enter old tunnel mountain rock deep inside dark travel nature landscape beautiful natural tourism abandoned landmark russia abstract light caving stone geology exploration mysterious hollow shadow wood gold darkness ancient caution speleology sign damaged unsafe vintage danger passage grunge geological painted grotto hazardous shaft satanov tunnels quarry mines city sataniv ukraine autumn day stones ukraine day wood