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.

A Thorneycroft motor van as used during World War I. (Photo by Topical Press Agency/Getty Images). August 1914

A dress rehearsal for the world premiere of Birmingham Royal Ballet’s Luna at the Hippodrome in Birmingham, UK on October 2, 2024. (Photo by Elliott Franks/The Times)

Guinness World Records declared Afshin Ghaderzadeh 20 years old as world’s shortest man with the height of 65.24 cm in Dubai on December 15, 2022. The Iranian citizen takes the title from previous record-holder Edward Hernandez, from Colombia, who stands at 72cm tall. (Photo by Pawan Singh/The National)

Zoi Karangelou of Greece compete in the Women's Solo Technical final on day one of World Aquatics Artistic Swimming World Cup Super Final 2025 at Xi'an Olympic Sports Centre on June 13, 2025 in Xi An, China. (Photo by Lintao Zhang/Getty Images)

Actress Anne Hathaway attends the “The Dark Knight Rises” World Premiere at AMC Lincoln Square Theater on July 16, 2012 in New York City. (Photo by Jim Spellman)

A severe thunderstorm hits Omaha, Neb., on Wednesday, June 12, 2024. (Photo by Chris Machian/Omaha World-Herald via AP Photo)

Patients from Rady Children's Hospital hug a bottlenose dolphin after being invited to swim and interact with dolphins at Sea World in San Diego, California August 27, 2015. Sea World has hosted Dolphin Interaction Program for seven years. It was started by dolphin trainer Joy Soto who battled and overcame non-Hodgkin’s lymphoma. (Photo by Mike Blake/Reuters)