A group of fashionable nonagenarians pose for a photo in Pengzhou, Sichuan, China on October 12, 2016. (Photo by Rex Features/Shutterstock)

Artist Sayna Soleimanpour shaves her legs in a bathtub as she performs a photoshoot in protest against the mistreatment and alienation of Turkish women based on their clothing, during a two-day curfew amid the spread of the coronavirus disease (COVID-19), on a street leading to the historical Galata Tower in Istanbul, Turkey, late December 25, 2020. (Photo by Umit Bektas/Reuters)

Kaden Bringsplenty brings his horse to the starting line as Native Americans from all over the United States participate in an Indian relay race over Memorial Day weekend at the Osage County Fairgrounds in Pawhuska, Oklahoma, U.S. May 30, 2021. (Photo by Stephanie Keith/Reuters)

Washington Nationals third baseman Anthony Rendon and reporter Alex Chappell are doused with water after the game against the Miami Marlins in Washington on August 30, 2019. (Photo by Brad Mills/USA TODAY Sports)

A cat dressed in a traditional outfit takes part during the Orthodox Christmas celebration in Kiev, Ukraine on January 7, 2020. Orthodox Christians celebrate Christmas Day on December 25 of the older Julian calendar, which currently corresponds to January 7 in the Gregorian calendar. (Photo by Pavlo Gonchar/SOPA Images/LightRocket via Getty Images)

To draw the public's attention to a new line of bathing suits, a Tokyo department store used live models to show off the suits on June 5, 1950. The rain didn't bother the curious, and both the girls and the crowd seemed to like the idea of staring at each other through the glass. (Photo by AP Photo via The Atlantic)

Jason Garcia poses as The Joker from Batman at the 2015 Comic-Con International in San Diego, California, July 9, 2015. (Photo by Sandy Huffaker/Reuters)

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.