Molten lava erupts from the Piton de la Fournaise, one of the world's most active volcanoes, at dawn on the French Indian Ocean Reunion Island, August 25, 2015. The eruption that started on Monday, is the fourth one this year for the Piton de la Fournaise, sending hot jets of molten lava spewing up from the peak. REUTERS/Gilles Adt TPX IMAGES OF THE DAY