Gobustan National Park  officially Gobustan Rock Art Cultural Landscape, is a hill and mountain site occupying the southeast end of the Greater Caucasus mountain ridge in Azerbaijan, mainly in the basin of Jeyrankechmaz River, between the rivers Pirsagat and Sumgait. It is located west of the settlement of Gobustan, about 40 miles (64 km) southwest of the centre of Baku on the west bank of the Caspian Sea. The territory of Gobustan is cut up with numerous, sometimes rather deep ravines. That is a suggested origin of the Gobustan geographical name. In 2007 Gobustan was declared a UNESCO World Heritage Site considered to be of "outstanding universal value" for the quality and density of its rock art engravings, for the substantial evidence the collection of rock art images presents for hunting, fauna, flora and lifestyles in pre-historic times and for the cultural continuity between prehistoric and medieval times that the site reflects. Apart from petroglyphs, there is also this musical gemstone known as Gaval Dash. It makes a tambourine-like sound when it is hit in different points.Among the stone books there are a big flat stone formed out of 3 supports. Suffice it to touch the object with a small stone, musical sounds come from it. The Gaval Dash have been formed due the combination of unique climate, oil and gas which can be found in the region of Azerbaijan.