A man walks his dog through Los Berros Mountain in El Paso with the Cumbre Vieja volcano in the background, on the Canary Island of La Palma, Spain, October 24, 2021. (Photo by Borja Suarez/Reuters)

A handout photo made available by Jose Juan Rodriguez Rocha, on 17 November 2021 shows lightning over Cumbre vieja Volcano as seen from El Paso, La Palma, Canary Islands Spain, 14 November 2021. The lightning over a volcano is sometimes seen due to the charge of electricity caused by the friction of the expelled particles within the column of ashes and pyroclastic rocks. (Photo by Jose Juan Rodríguez Rocha/EPA/EFE)

The lava of the Cumbre Vieja volcano reaches the door of a tattoo shop in La Laguna neighborhood, on the Canary Island of La Palma, Spain, December 14, 2021. (Photo by Borja Suarez/Reuters)

People watch an eruption of the South East volcano of Etna is seen from the village of Nicolosi, Italy February 10, 2022. (Photo by Antonio Parrinello/Reuters)

Smoke and ash are visible during the the Shiveluch volcano's eruption on the Kamchatka Peninsula in Russia, Tuesday, April 11, 2023. Shiveluch, one of Russia's most active volcanoes, erupted Tuesday, spewing clouds of ash 20 kilometers into the sky and covering broad areas with ash. (Photo by Alexander Ledyayev via AP Photo)

The Villarrica volcano lights up the sky at night seen from Pucon town, Chile on December 14, 2023. (Photo by Cristobal Saavedra Escobar/Reuters)

People who live in nearby villages make their yearly pilgrimage as they walk up the slopes of the Popocatepetl volcano in Mexico, Wednesday, March 12, 2014. Every year on March 12, residents make their way up the volcano celebrate the day of Don Gregorio Chino Popocatepetl, as the volcano is known to them, with food, music, dance and fireworks. When the sun rises, hundreds of pilgrims head out from the towns of Santiago Xalintzintla, Tlamacas and San Nicolas de Los Ranchos in van and trucks to drive, then walk up the 17,886-foot (5,450-meter) volcano for their daylong celebration. (Photo by Eduardo Verdugo/AP Photo)

Located in East Java, Indonesia, Kawah Ijen is a volcano is home to the largest acidic crater lake in the world. What turns the waters of the lake in the 1 km caldera its beautiful turquoise color are the highly sulfuric gases emitted from the volcano underneath.