Russian explorers using two mini-submarines reached the bottom of Siberia's vast Lake Baikal - one of the last relatively unexplored frontiers on Earth. The team announced they had sunk to a record depth of 1,680 metres (5,512 ft).
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The bottom of the lake is 1,186.5 m (3,893 ft; 648.8 fathoms) below sea level, but below this lies some 7 km (4.3 mi) of sediment, placing the rift floor some 8–11 km (5.0–6.8 mi) below the surface, the deepest continental rift on Earth.
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.
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 first humans to explore the bottom of Lake Baikal wasn't until 2008, and not much research has commenced since then. So, truthfully, we still don't know what lurks down there. Rest assured, though, that the lake is flourishing with extraordinary life.
While the Marianas Trench is the deepest place of the planet's oceans, Lake Baikal is the deepest of all the lakes in the world. Its depth is 1 642 meters (5 387 feet). Compared to Lake Baikal, the depth of the Great Lakes is more modest.
Each Epischura is no bigger than a poppyseed, but there are zillions floating through Baikal, which together form an incredibly efficient filtration system. They suck tiny scraps of food out of the lake, and along with them any specks of pollution they encounter. It's the Epischura that keep Baikal's water so pure.
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.
Baikal is one of the few lakes on the planet in which, according to the standards, it is allowed to take water for drinking from open reservoirs. Water is extracted from special layers of the lake, which were on the surface of the lake hundreds of years ago, from a depth of 400m.
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.
Are there any states with no lakes? The only state in the US with no natural lakes is Maryland. Although Maryland has rivers and other freshwater ponds, no natural body of water is large enough to qualify as a lake.
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.
The world's deepest ancient lake, Lake Baikal in Russia, has a diverse endemic fauna, including Baikal seals Pusa sibirica, the apex predator of the lake and the only pinniped species inhabiting exclusively freshwater systems.