People wearing fancy costumes walk near a skating rink past signs requesting to use protective face masks and to keep a social distance amid the coronavirus disease (COVID 19) outbreak, as heavy fog covers a square named after Soviet state founder Vladimir Lenin in Stavropol, Russia on December 1, 2020. (Photo by Eduard Korniyenko/Reuters)

A performer gestures at the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, December 25, 2021. The 23rd Harbin Ice-Snow World opened to the public on Saturday. (Photo by Xie Jianfei/Xinhua News Agency/Profimedia via 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.

David Goffin of Belgium meets a koala during a promotional event for the Australian Open tennis tournament at Melbourne Park on January 17, 2018. (Photo by Fiona Hamilton/Reuters/Tennis Australia)

Kosovar Bosnian women help the bride Sellma Demirovic (C) to be dressed with traditional clothes on her wedding day for a traditional ceremony in the village of Donje Ljubinje, Kosovo, 14 August 2021. (Photo by Valdrin Xhemaj/EPA/EFE)

A Palestinian throws snow at his wife during a snow storm in West Bank old city of Hebron, January 26, 2016. (Photo by Mussa Qawasma/Reuters)

A lenticular cloud is seen during sunrise from Gokmen Aerospace Training Center (GUHEM) in Bursa, Turkiye on January 19, 2023. (Photo by Halit Mirahmetoglu/Anadolu Agency via Getty Images)

A rainbow cuts through a squall above The Needles, the Isle of Wight, on Tuesday evening, April 16, 2024. (Photo by Jamie Russell/IslandVisions via BNPS)