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.

Police dog handlers wait outside the Loftus Road stadium after FA Cup Fourth Round between Queens Park Rangers and Chelsea on January 28, 2012 in London, England. Security has been stepped up after QPR player Anton Ferdinand recieved a package containing a bullet. (Photo by Dan Kitwood/Getty Images)

Dramatic aerial image show a Scots vessel slowly sinking beneath the waves after it hit a “black spot” in the North Sea mid-voyage. Ocean Maid BA55 capsizing amidst the waves after it ran aground off the shore of Fraserburgh, Aberdeenshire, area of Scotland on yesterday morning, October 24, 2022. Fraserburgh Royal National Lifeboat Institution (RNLI) rescued the four crew members from the shipwreck at 5:56 am, guiding them into lifeboats as they escaped the keeling ship. (Photo by Deadline News)

In this photo taken on Thursday, August 22, 2019, and distributed by Roscosmos Space Agency Press Service, the Russian Progress 73 cargo ship blasts off from the launch pad at Russia's space facility in Baikonur, Kazakhstan. The new Russian rocket, that is expected to replace the current model sending manned missions into space, blasted off from Kazakhstan on Thursday, carrying a Soyuz capsule with a humanoid robot. (Photo by Roscosmos Space Agency Press Service via AP Photo)

Fireworks light the morning sky March 6, 2012 as the Disney Fantasy, the newest Disney Cruise Line ship, arrives in her home port of Port Canaveral, Florida after traveling nearly 4,700 miles across the Atlantic Ocean from Bremerhaven, Germany. The 4,000-passenger Disney Fantasy will welcome guests on her maiden voyage on March 31, 2012, sailing seven-night cruises to the Caribbean and Disney's private island Castaway Cay, from Port Canaveral. (Photo by Todd Anderson/Disney Parks via Getty Images)

This aerial picture taken on August 16, 2020, shows the MV Wakashio bulk carrier that had run aground and broke into two parts near Blue Bay Marine Park, Mauritius. A ship that has leaked more than 1,000 tonnes of oil in pristine waters off the Mauritius coast has split into two, its Japanese operator said August 16, 2020. (Photo by AFP Photo/Stringer)

Bystanders look at MV Wakashio bulk carrier that had run aground and from which oil is leaking near Blue Bay Marine Park in south-east Mauritius on August 6, 2020. The carrier, belonging to a Japanese company but Panamanian-flagged, ran aground on July 25 and its crew was evacuated safely. The ship was empty at the time but was carrying 200 tonnes of diesel and 3,800 tonnes of bunker fuel, according to the local press. (Photo by Dev Ramkhelawon/L'Express Maurice/AFP Photo)