The Nedumala Caves are in Piralimattam. They are located on the border of Idukki district and Ernakulam District in Kerala state, India. Piralimattom Nedumala hills is a prehistoric site. Caves well carved on granite rock and stone shelter are here. According to Dr. P. Rajendran, an archaeologist and UGC Research Scientist, caves are points towards its chronology to the Neolithic period of around 4000 BC.