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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Lake Baikal is not only the largest, deepest, and oldest lake in the world, but houses around 2,000 unique known species of animal that are not found anywhere else on Earth.
World's Largest Lake (by volume):Lake Baikal is the world's largest freshwater lake in terms of volume. It contains about 5,521 cubic miles of water (23,013 cubic kilometers), or approximately 20% of Earth's fresh surface water.
Not only is Lake Baikal safe to swim in, but it also boasts some of the purest water in the world. The only drawback is the temperature - even during the warmer months, a dip in the lake is pretty invigorating.
The total water volume in Lake Michigan-Huron, at 2,026 cubic miles (8,443 cubic kilometers), is much smaller than the volume of Lake Baikal. Great Lakes map: Map of Lake Superior and Lake Michigan-Huron - World's largest freshwater lakes (by surface area).
Blue Lake, New ZealandBlue 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. The water in Blue Lake is comparable to distilled water based on laboratory measurements.
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. It contains 20% of the world's total unfrozen freshwater reserve.
The ringed seals is considered the ancestor of the Baikal seal, and are thought to have reached the lake by traveling up the river system and drainage that runs from the lake to the Arctic Ocean some 400,000 years ago during the Pleistocene.
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.
The largest species is the Siberian sturgeon, which sometimes measures more than 6 1/2 feet (2 meters) long. The only mammal is the Baikal seal. The first hydrothermal vents, or hot-water springs, ever discovered in a freshwater lake were found at the bottom of Lake Baikal in 1990.