Two brown bear cubs born at Whipsnade Zoo. (Photo by Evening Standard/Getty Images). 1970

A gibbon drinks from a soft drink bottle, given by a tourist, at a zoo in Kunming, Yunnan province, June 18, 2015. (Photo by Wong Campion/Reuters)

A reveller smiles as she walks in the rain at Worthy Farm in Somerset during the Glastonbury Festival in Britain, June 28, 2015. (Photo by Dylan Martinez/Reuters)

A Sumatran Owl is seen in Palembang City, Indonesia on March 5, 2020. (Photo by Sigit Prasetya/Opn Images/Barcroft Media via Getty Images)

American model Kendall Jenner in the second decade of May 2024 hits the steam room for FWRD. (Photo by Kendall Jenner/Instagram)

A person participates in the annual “Battle of the Oranges” in the northern city of Ivrea, Italy on February 19, 2023. (Photo by Massimo Pinca/Reuters)

Australian ballet dancers rehearse their moves on Whitehaven Beach on June 11, 2010 on Hamilton Island, Australia. (Photo by James Morgan/Hamilton Island via Getty Images)

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.