What is the oldest natural lake in the United States?

Clear Lake is one of California's oldest lakes and the largest natural lake (177 km2) existing entirely within California. It is also believed to be the oldest natural lake in North America, with continuous lake sediments dating to the early Pleistocene, yielding age estimates of 1.8–3.0 million years old.



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Lake Ohrid is considered the deepest and oldest lake in Europe. It was reported that the Lake has the most biodiverse freshwater bodies of water in the world with many endemic species.

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1. Blue Lake, New Zealand. The Blue Lake is the clearest lake in the world. New Zealand is well-known for its natural beauty, with mountainous terrains surrounding crystal clear lakes whenever you hop out of the city.

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Situated in south-east Siberia, the 3.15-million-ha Lake Baikal is the oldest (25 million years) and deepest (1,700 m) lake in the world.

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At 1,943 feet (592 meters), Crater Lake is the deepest lake in the United States and one of the deepest in the world. The depths were first explored thoroughly in 1886 by a party from the U.S. Geological Survey. Their primitive sounding device consisted of a lead pipe attached to piano wire.

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Canada has the most natural lakes in the world followed by Russia and USA. About 9% of Canada's surface area is covered by lakes. The Great Bear Lake is the largest lake in Canada.

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Benxi Lake in Liaoning Province of China was lately approved by Guinness World Records as “the world's smallest lake”. The lake was named after Benxi City where it is located. As a natural lake, Benxi Lake is only 15 m² large, yet the water is quite clear.

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Located in Russia in the southern region of Siberia, Lake Baikal is the world's largest freshwater lake by both volume (22995 km3) and depth (1741m).

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Lake Baikal is a freshwater lake located in a geological rift valley in south-eastern Siberia. Soundings taken from the lake's Central Basin revealed it to be 1,642 metres (5,387 feet) deep. The lake is 636 kilometres (395 miles) long, with an average width of only 48 kilometres (30 miles).

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Lake Ladoga, Russian Ladozhskoye Ozero or Ladozhskoe Ozero, largest lake in Europe, located in northwestern Russia about 25 miles (40 km) east of St. Petersburg.

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Lake Karachay, a small lake in the southern Ural mountains in western Russia, is thought to be the most polluted spot on Earth. Starting in 1951, the Soviet Union used Karachay as a dumping site for radioactive waste from Mayak, a nearby nuclear waste storage and reprocessing facility located near the town of Ozyorsk.

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Blue Lake, New Zealand
But the country is also famous for having the clearest lake in the world! Blue Lake has underwater visibility up to 70 to 80 meters or 230 to 260 feet down, which is insane! Apart from being the world's clearest lake, it's also the clearest body of natural freshwater.

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Italy's Lugano and Maggiore were the most polluted in an international survey of 38 lakes.

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