Birtvisi Natural Monument (Georgian: ) is a rocky landscape 5 km to the north from village in the Tetritsqaro Municipality in Kvemo Kartli region of Georgia, adjacent to the Algeti National Park, south-west of the nation's capital Tbilisi. Birtvisi rocks elevation 950-1050 meters above sea level. Scenic landscape with volcanic rocks in the gorge of Algeti River belongs to outskirts of Trialeti Range.