A tourist's umbrella blows upside down as she covers from the heavy rain and high winds, while she tours the city centre, as storm Konrad hits Spain, Portugal and France, in Ronda, Spain, on March 13, 2025. (Photo by Jon Nazca/Reuters)

A competitor in the carting category of the Henrik Sečnik dog mushing race in Hraše, Slovenia on April 8, 2024. Over 100 dogs and their owners from Slovenia and abroad competed in the 10th edition of this international race. (Photo by Luka Dakskobler/SOPA Images/Rex Features/Shutterstock)

Mother Nesrin Mehre, mourns near the body of Muhammad Mehre was killed in an Israeli attack on al-Nasr neighborhood in northwestern Gaza, on September 23, 2025. His body was taken from al-Shifa Hospital for burial. (Photo by Khames Alrefi/Anadolu via Getty Images)

Chimpanzees are fascinated as bubbles are fired from a bubble gun at the Tacugama Chimpanzee Sanctuary in Sierra Leone in the second decade of June 2024. The keepers used non-toxic soap liquid to create the bubble barrage. (Photo by Renato Granieri/Media Drum Images)

A fisherman brings his catch ashore from the Deduru Oya Reservoir, where giant snakeheads have become an invasive species in Walpaluwa village, Sri Lanka, Thursday, October 30, 2025. (Photo by Eranga Jayawardena/AP Photo)

This view shows giant hot air balloons of various shapes being lifted to begin flights from the Metropolitan Park over the city of Leon during the 2025 International Balloon Festival (FIG) in the state of Guanajuato, Mexico on November 15, 2025. (Photo by Mario Armas/AFP Photo)

Visitors pass an exhibit for Sculpture by the Sea, along the coastal walk from Bondi to Tamarama in Sydney, Australia on October 24, 2025. The annual event is Australia’s largest annual outdoor sculpture exhibition. (Photo by Xinhua News Agency/Rex Features/Shutterstock)

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.