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.

Israeli soldiers cry during a state memorial ceremony marking two years since the 2014 Gaza war “Operation Protective Edge” at Mount Herzl military cemetery in in Jerusalem, Israel, 26 July 2016. More than 2.000 people were killed in the conflicts between Israel and Palestine. (Photo by Abir Sultan/EPA)

Bediha Gun (L) of Turkey in action against Oleksandra Khomenets (R) of Ukraine during their semi final bout of the women's Freestyle 55kg category at the European Wrestling Championships in Budapest, Hungary, 30 March 2022. (Photo by Tibor Illyes/EPA/EFE)

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Performers pose during the 2022 ICC Women's Cricket World Cup match between Australia and West Indies at Basin Reserve on March 15, 2022 in Wellington, New Zealand. (Photo by Hagen Hopkins-ICC/ICC via Getty Images)

Pilots of the Royal Saudi Air Force Hawks aerobatic team perform during a show in Kuwait City on February 26, 2023 as the Gulf state marks its 62nd Independence Day and 32nd anniversary of the end of the Gulf war with the liberation of Kuwait from Iraqi occupation. (Photo by Yasser Al-Zayyat/AFP Photo)