People walk under a light projection during the Shanghai International Light Festival at a shopping mall complex in Shanghai on September 22, 2025. (Photo by Jade Gao/AFP 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.

Goats wait to get unloaded from a vehicle at a livestock market during Dashain, the biggest religious festival for Hindus in Nepal, in Kathmandu, Nepal October 4, 2016. (Photo by Navesh Chitrakar/Reuters)

A young macaque perches on a pole, observing nearby tourists while eating some seeds in Jigokudani Yaen-koen wild macaque monkey park on February 16, 2015 in Yamanouchi, Nagano, Japan. (Photo by Manuel Romaris/Getty Images)

Turkish National athlete Sahika Ercumen persists in her preparations for the dive along the shores of Karamagara Bay as she will dive to break the 105-meter world record in the variable weight category without fins on the 100th anniversary of the Turkish Republic in Hatay, Turkiye on October 15, 2023. The national athlete is determined to exceed the 105-meter world record currently held by Serbian diver Lena Balta in the variable weight category without fins. (Photo by Sebnem Coskun/Anadolu via Getty Images)

Young Legong dancer portrait, Ubud, Bali on October 25, 2023. While the childrens' parents are out working, in pursuits including farming, fishing and clothes making, their offspring spend the long sunny days making their own fun, and as these pictures show not a minute is wasted. (Photo by David Lazar/Animal News Agency)

Participants compete in a wife-carrying championship in Tapiobicske, Hungary, August 7, 2021. Some 40 Hungarian husbands, with their wives on their backs, clambered over rough terrain on Saturday in the nation's second wife-carrying contest. (Photo by Marton Monus/Reuters)

American singer-songwriter Miley Cyrus attends the 2020 MTV Video Music Awards, broadcast on Sunday, August 30, 2020 in New York City. (Photo by Vijat Mohindra/MTV VMAs 2020/Vijat Mohindra/MTV VMAs 2020 via Getty Images)