A view of sunken tank which promotes scuba diving tourism with its location at an artificial reef of Guvercin Island region of Kas district of Antalya, Turkiye on December 04, 2022. The sunken tank, situated at a depth of around 15 meters, is visible to both seasoned divers and those undergoing basic diving training. (Photo by Mahmut Serdar Alakus/Anadolu Agency via Getty Images)

A photograph of a girl carrying a baby on the spot of the previous day's car bomb attack that killed killed and wounded hundreds at the Sadriyah market in Baghdad, Iraq, Thursday, April 19, 2007, is inserted into the scene at the same location on Monday, March 20, 2023, 20 years after the U.S. led invasion on Iraq and subsequent war. (Photo by Hadi Mizban/AP Photo)

An aerial view of sinkholes (obruk), caused by some form of collapse of the surface layer, in Konya, Turkiye on September 17, 2024. Many sinkholes are observed in the fields of Eseli Plateau located within the borders of Resadiye Neighborhood in the north-west of Karapinar district, where sinkhole formation has increased rapidly in recent years. (Photo by Serhat Cetinkaya/Anadolu via Getty Images)

An aerial view of Charyn Canyon located about 200 kilometers east of Almaty city in Kazakhstan on September 22, 2024. The canyon, visited by more than 50,000 people each year, was placed under protection in 1964 and became part of the Charyn National Park, established on February 23, 2004. (Photo by Muhammed Enes Yildirim/Anadolu via Getty Images)

Drivers merge onto expressway lanes after passing through the Wuzhuang toll station at Chuzhou, in China's eastern Anhui province, as they make their way back home on the second-to-last day of an eight-day National Day holiday on October 7, 2025. The Wuzhuang toll station, located on the border between Anhui and Jiangsu provinces, is China's largest expressway toll station, with a total of 36 lanes. (Photo by AFP Photo/China Stringer Network)

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.

Workers demonstrate outside the factory of Hua Yang Printing Holdings Co Ltd on October 30, 2007 in Shenzhen of Guangdong Province, China. Over 1,000 workers of the company have blocked the 107 State Highway where the firm is located, to protest against their employer, who owed half a month's salary to the workers. (Photo by China Photos/Getty Images)