Great Bichigt Rock of Bayan Mountain range houses a natural gallery of petroglyphs, written by ancient people 3000 years ago revealing precious cultural heritage. One interesting image shows a man cultivating land with an ox plough. This picture is re¬ported to date back to 3 millennia BC. Ap¬parently settlers on this site used to culti¬vate crops 3000 years ago. It is questioned if Mongolians where first to invent carts for agriculture.