Yanartaş (, Turkish for "flaming stone") is a geographical feature near the Olympos valley and national park in Antalya Province in southwestern Turkey. It is the site of dozens of small fires which burn constantly from vents in the rocks on the side of the mountain. Directly below the fires are the ruins of the temple of Hephaistos, the Greek god who was associated with fire through his role as the blacksmith to the gods. To see the fires and the ruins, visitors must first go to the entrance at the foot of the mountain. The site is at the top of a one kilometre climb. This is basically a rock stairway and is easily managed. Most people visit at night, when the fires are at their most spectacular. In ancient times sailors could navigate by the flames, but today they are more often used to brew tea.