Ijen volcano in East Java contains the world\’s largest acidic volcanic crater lake, called Kawah Ijen, famous for its turquoise color. The colours of the lake contrast with the sterile moonscape of the rest of the crater. Active volcano, constantly spewing sulfur smoke clubs, is incredible in its beauty blue fire and extremely hard working conditions in the sulfur mine. Sulfur combusts on contact with air to create stunning blue lava-like rivers of light in the Kawah Ijen crater.
credit: alxdup