There are more than 20,000 pieces of rock art and petroglyphs all along the Karakoram Highway in Northern Areas of Pakistan that are concentrated at ten major sites between Hunza and Shatial. The carvings were left by various invaders, traders and pilgrims who passed along the trade route, as well as by locals. The earliest date back to between 5000 and 1000 BC, showing single animals, triangular men and hunting sccenes in which the animals are larger than the hunters. These carvings were pecked into the rock with stone tools and are covered with a thick patina that proves their age.
The archaeologist Karl Jettmar has pieced together the history of the area from various inscriptions and recorded his findings in Rockcarvings and Inscriptions in the Northern Areas of Pakistan and the later released Between Gandhara and the Silk Roads - Rock carvings Along the Karakoram Highway.
Chilas comes under FANA(Federally Administered Northern Areas). The weather is hot and humid in the summer and dry and cold in the winter. It can be reached through Karakurram highway and also from Kaghan valley passing through Babusar Pass. The mighty river Indus passes through the Chilas valley. It is not recommended for European Foreigners to travel alone in Chilas