Petroglyphs (prehistoric rock arts) are very prominent as you set to trek in the kingdom of Saudi Arabia. These drawings or carvings provide us very interesting information about the lives of people inhabited in the area in ancient times.
This location had been named by previous travelers as Graffiti Rocks though I believe it will be apt to call it petroglyphs as the right terminology.
An about 110 Km drive from Riyadh City Center along the Makkah Road, you can come across these rock arts. Here, a good number of mixed up petroglyphs like hunters, a family of ostrich, ibex and other animals provide us clues of the life around the area when most of the deserts were covered in vegetation as recorded. These petroglyphs are said to be of neolithic period, after 3000 BC.
Courtesy: www.splendidarabia.com