A Balinese man performs a traditional dance at Art Center Denpasar on Indonesia's resort island of Bali on May 30, 2025. (Photo by Sonny Tumbelaka/AFP Photo)

Steam emerges from a cooling tower of the nuclear power plant Leibstadt near Leibstadt, Switzerland, November 18, 2014. (Photo by Arnd Wiegmann/Reuters)

A red squirrel leaps over a gray squirrel after the larger squirrel became annoyed with its territory being encroached upon, Saturday, May 28, 2022, in Freeport, Maine. (Photo by Robert F. Bukaty/AP Photo)

Revellers take part during the annual Easter Parade and Bonnet Festival on 5th Avenue in Manhattan, New York City, U.S., April 9, 2023. (Photo by Eduardo Munoz/Reuters)

Sporty Kendall Jenner shows her flexibility as she models Adanola's latest activewear collection on January 8, 2024. (Photo by Sean Thomas/The Mega Agency)

A policeman stops a cyclist as demonstrators from Extinction Rebellion (XR) protest during the NATO Summit by blocking the A12 highway in The Hague, The Netherlands, 25 June 2025. The Netherlands, for the first time in NATO's history of existence, is hosting a NATO summit. (Photo by Sebastiaan Barel/EPA)

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.

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)