Yanar Dag (Azerbaijani: Yanar Dağ, translated as "burning mountain"), is a natural gas fire which blazes continuously on a hillside on the Absheron Peninsula on the Caspian Sea near Baku, the capital of Azerbaijan, which itself is known as the "land of fire." Flames jet into the air 3 metres (9.8 ft) from a thin, porous sandstone layer.