​​As per a survey by archaeology directorate, there are 62 petroglyphs in Barsu, cultural affairs minister Sudhir Mungantiwar said in a written reply to a query by leader of opposition Ambadas Danve and other in the House. Work on conservation of 17 places having petroglyphs in Ratnagiri district is underway, the minister said. Nine petroglyphs in Ratnagiri district have been included in UNESCO heritage list, which includes three from Barsu, he said.