Single Sports Second Prize. Garrett Gerloff (31) and Sandro Cortese (11) crash in the World Superbike warm-up during the World Championship on Phillip Island, Australia. (Photo by Scott Barbour/AAP Photo/Istanbul Photo Awards 2021)

People carry portraits of relatives who fought in World War II, during the Immortal Regiment march in Bishkek, Kyrgyzstan, Monday, May, 9, 2022, marking the 77th anniversary of the end of World War II. (Photo by Vladimir Voronin/AP Photo)

Zeebra Lisa Thrower, New Zealand is modelled in the Bizarre Bra Section during the 2023 World of WearableArt Awards Night at TSB Bank Arena on September 22, 2023 in Wellington, New Zealand. (Photo by Hagen Hopkins/Getty Images for World of WearableArt)

The queens pose for a photo together during RuPaul's Drag Race S18 Premiere Event at Aqua New York on December 09, 2025 in New York City. (Photo by Santiago Felipe/Getty Images for MTV)

File photo taken on July 24, 2011 shows the scenery of karst landform in Dacai Township under Maonan Autonomous County of Huaijiang, south China's Guangxi Zhuang Autonomous Region. The World Heritage Committee on Monday inscribed an extension of South China Karst, a natural World Heritage Site since 2007, into the UNESCO's World Heritage List. (Photo by Wang Xiufa/Xinhua)

Thailand's Lac Somruedee Pruepruk balances the ball during the sepak takraw women's match against Malaysia at the 31st Southeast Asian Games (SEA Games) in Hanoi on May 17, 2022. (Photo by Ye Aung Thu/AFP Photo)

A man falls from a horse at a rodeo exhibition during Tradition Day, aimed to preserve gaucho traditions, in San Antonio de Areco, Argentina, Sunday, November 13, 2022. Tradition Day is celebrated to honor the birth of Argentine writer Jose Hernandez, author of the country's national poem “The Gaucho Martin Fierro”. (Photo by Natacha Pisarenko/AP Photo)

Lake Baikal is the world's oldest lake, at 25 million years (possibly older), and deepest, averaging 744.4 metres (2,442 ft).

Located in the south of the Russian region of Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast, it is the most voluminous freshwater lake in the world, containing roughly 20% of the world's unfrozen surface fresh water.