The Piton de la Fournaise is 2632 m high and was formed around 400,000 years ago on the south side of the Piton des Neiges. Although it is the last active volcano on Reunion, it is also one of the most active volcanoes in the world. It erupts almost every year, although it remains quite calculable. Thin lava emerges from its vent and occasionally "floods" the coast road. This spectacle attracts onlookers from all over the island.