The ponds that are common in residential neighborhoods in USA are not installed as water features. They are actually retention basins used to offset the drainage capacity of the ground removed by paving roads and building houses.
2. Lake Karachay in Russia has been used as a radioactive waste dump for a long time now and it has been described as the most polluted place on the planet. Just standing on the shore of this lake for an hour would give you a lethal dose of radiation.
3. North America's Lake Superior contains 10% of the world’s surface freshwater and at its depths also holds the remains of 6,000 shipwrecks.
4. Some lakes in USA are stocked with fishes by dropping hundreds of fish out of an airplane flying over.
5. Lake Baikal holds one-fifth of the world’s unfrozen freshwater; more than all the great lakes combined, yet it covers half the area of Lake Michigan. It is both the deepest (1 mile) and the oldest (25 million years) lake in the world.
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Lake Disappointment in Western Australia was named so because the explorer who discovered it followed creeks inland expecting to find a large lake, only to be disappointed when it turned out to be a large salt flat.
7. There is a lake in the country of Palau where jellyfish evolved without stingers after the lake's connection to the sea closed, leaving them isolated from their natural predators. These 'Golden' jellyfish are totally harmless to humans and you can swim with them.
8. The saltiest body of water on Earth is the Don Juan Pond. It is located in Antarctica but never freezes because of its high salinity.
9. There is a Native American lake named Chargoggagoggmanchauggagoggchaubunagungamaugg. It means "you fish on your side, I fish on my side, and no one fishes in the middle." Located in the town of Webster, Massachusetts, it is known more commonly as Lake Chaubunagungamaug or Webster Lake.
10. Scattered around Roopkund Lake in the Indian Himalaya are the bones of about 800 people who seemingly died in a single unknown event in 800 A.D. Newer studies reveal that some of the bones belong to another group of people who also died in a single event, a thousand years after the others.
The bottom of Lake Ontario is so cold that skyscrapers use water from the bottom of the lake as a coolant for AC systems.
12. Lake Tahoe at one time was named Lake Bigler in honor of the popular third governor of California. However, once it was revealed that Bigler was a Confederate sympathizer during the US Civil War, his name was removed from the lake and renamed Tahoe
13. Lake Chagan in Kazakhstan was created using a nuclear weapon and the radioactivity in the lake has decayed to the point that people can swim in it safely.
14. In 1986, Lake Nyos in Cameroon expelled up to 300,000 tons of CO2 in the air due to seismic activity under the lake, suffocating every living animal within a 16-mile radius including 1700 villagers and 3500 livestock. The blue lake turned deep red from oxidization and water levels dropped by a meter.
15. Gaet'ale Pond in Ethiopia is one of the most saltiest bodies of water in the world. It formed during an earthquake in 2005. Its water is yellow and it occasionally releases gases that kill small animals that get close to it.
Lake McDonald located in Glacier National Park in the U.S. state of Montana is remarkable for having very clear water. One of the most striking features of this lake is the presence of a variety of colored rocks and pebbles just below the water surface and on the shores. The rocks range in color from dark red to maroon, and from green to blue.
17. Lake Michigan gets so clear after winter's ice melts that you can actually see shipwrecks in the depths from the air.
18. Lake Okeechobee, despite being Florida's largest freshwater lake and covering an area of 730 square miles, has an average depth of just 9 feet.
19. Mount Storm Lake in West Virginia is a 1200 acre lake that is super-heated by a coal burning power plant and even in zero degree temperatures the water in the lake never dips below 50 degrees.
20. Loughareema Lake located in the County Antrim in Northern Ireland has been nicknamed ‘The Vanishing Lake’ because it fills up and empties frequently, but unpredictably due to unknown geological conditions. There are three streams flowing into the lake but none out.
21Great Salt Lake
At the depths of the Great Salt Lake in Utah is a super-dense layer of water called the “Deep Brine.” Divers describe it as having the consistency of runny Jello.
22. Torch Lake, which is often compared to the Caribbean is located in Michigan and is one of the clearest lakes in the world.
23. The Toba supervolcanic eruption occurred about 75,000 years ago at the site of present-day Lake Toba in Indonesia. It is the largest known explosive eruption on Earth in the last 25 million years. It had global consequences for human populations in that it caused a population bottleneck which affects genetic diversity in humans to this day.
24. Lake Michigan and Lake Huron are hydrologically the same lake. They are joined by the 5-mile wide, 120ft deep Straits of Mackinac, and depending on conditions, water can flow in either direction, which keeps their water levels similar.
25. There exists an underwater forest in Lake Kaindy in Kazakhstan that was created after an earthquake in 1911 triggered a large landslide blocking the gorge and forming a natural dam