A skater observes pancakes snow on the frozen Lake des Rousses in Les Rousses, central-eastern France, on January 1, 2025. This phenomenon forms when slushy ice in water clumps into round, pancake-like shapes due to waves or currents. (Photo by Fabrice Coffrini/AFP Photo)

Men carry a dog on an inflated tube as they wade through floodwaters at Kongba in Imphal East on June 3, 2025. Flash floods and landslides after torrential monsoon rain over the last two days killed at least 30 people in India's northeast, officials said on June 1. (Photo by AFP Photo/Stringer)

Twelve-year-old Kelia Gallina of French Polynesia after surfing in Heat 1 of the Elimination Round at the Lexus Tahiti Pro on August 8, 2025 at Teahupoo, Tahiti, French Polynesia.(Photo by Brent Bielmann/World Surf League via Getty Images)

Richard Rude Junior of the United States, competes on his way to win the UCI MTB Enduro Men Elite, Mountain Bike World Championship, Monday, September 1, 2025, in Fiesch, Switzerland. (Photo by Maxime Schmid/Keystone via AP Photo)

Women wearing braided straw hats dance as the Owara Kaze-no-Bon dance festival begins on September 1, 2025 in Toyama, Japan. The festival, believed to have more than 300 years history, continues till September 3. (Photo by The Asahi Shimbun via Getty Images)

A graffiti by urban artist TVBoy depicts President of the Royal Spanish Soccer Federation (RFEF) Luis Rubiales kissing Spanish player Jenni Hermoso, in Barcelona, Spain, 01 September 2023. Suspended RFEF President Luis Rubiales announced on 25 August that he would not resign over the kiss on the lips he gave to Spanish player Jenni Hermoso during celebrations of the FIFA Women's World Cup final. (Photo by Quique Garcia/EPA)

(L-R) Daniel Radcliffe, Emma Watson, J K Rowling and Rupert Grint attend the World Premiere of “Harry Potter And The Deathly Hallows: Part 1” held at The Odeon Leicester Square on November 11, 2010 in London, England. (Photo by Dave Hogan/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.