Nedumala Caves, Piralimattam
The Nedumala Caves are in Piralimattam, on the border of Idukki district and Ernakulam District in the Indian state of Kerala. Piralimattom Nedumala hills is a prehistoric site. Caves feature carvings on granite rock and stone shelter. According to archaeologist P. Rajendran, UGC Research Scientist, the caves may date to the Neolithic period around 4000 BC. Three caves discovered at Piralimattam in Nedumala have elaborate petroglyphs in cupules and shallow grinding surface. Many concave cupules and grinding surfaces are visible, both completed and incomplete.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).