Relatives of an earthquake victim are led away from ruins by a Policeman, on October 25, 2011 in Van, Turkey. Media are reporting more than 400 people have been killed in the 7.2 earthquake that struck in Eastern Turkey on October 23. The earthquake has left up to 40,000 people homeless in almost freezing conditions. (Photo by Ahmad Halabisaz/Getty Images)

Tree trunks lie on the railtracks that will be used to transport nuclear waste on November 25, 2011 in Leitstade, near Metzingen, Germany. A train carrying the Castor containers of processed, spent nuclear fuel started from La Hague in France Wednesday for its journey to the Gorleben temporary nuclear waste storage facility in Germany, and thousands of protesters are expected to attempt to blockade the route. (Photo by Carsten Koall/Getty Images)

An activist in a Guy Fawkes mask adjusts a skull and crossbones flag during a demonstration against the Anti-Counterfeiting Trade Agreement (ACTA) on February 25, 2012 in Berlin, Germany. (Photo by Adam Berry/Getty Images)

A man demonstrates outside Republican presidential candidate Donald Trump's news conference at Trump Tower in New York, U.S., May 31, 2016. (Photo by Shannon Stapleton/Reuters)

Migrating starlings fly in formation near the southern Israeli town of Rahat February 2, 2015. The phenomenon, known as murmuration, is most common during the winter months. (Photo by Nir Elias/Reuters)

Regrowth of plants is seen in bushland that was destroyed by bushfires, in Kulnura, New South Wales, 15 January 2020. (Photo by Joel Carrett/EPA/EFE/Rex Features/Shutterstock)

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.

Cory Ritz braces himself as a wave bursts onto a pier at the Boynton Beach inlet on August 25, 2011 in Boynton Beach, Florida. Hurricane Irene is moving over the Bahamas and could still be a major storm as it approaches the North Carolina coast the morning of August 27. (Photo by Joe Raedle/Getty Images)