5. Horseshoe Lake, USA
The carbon dioxide emitted from the fissures in the bottom of Horseshoe Lake is deadly for everything. The lake was the cause of death of four people, as well as trees growing 100 acres around it. The danger is announced by signs all around.
4. Boiling Lake, Dominica
This mountain lake located eight hours from the ground may heat up to 198°F (92°C) due to hot air spurts from beneath the ground — they often neighbor with lava. Swimming in the lake is strictly prohibited even if there are no characteristic bubbles on its surface because boiling starts in a matter of seconds.
3. Rio Tinto, Portugal/Spain
Fossil excavation that has been carried out at the head of the Tinto River for more than 3,000 years lead to it being saturated with copper, iron, and heavy metals, with the acidity leaping sky-high. However, even in such conditions there’s the river’s own ecosystem that includes bacteria that oxidize metals and make the water bright red.
2. Drake Passage
Lots of icebergs, wind speeds reaching 80 miles per hour, strong currents, and poor visibility are part of the ordeal that ships going through the Drake Passage must survive. The passage is considered a veritable ship cemetery for boats that capsized here from Magellan’s times until the discovery of the Panama Canal in the 20th century.
1. Lake Kivu
This seemingly peaceful lake keeps a deadly secret: there are layers of CO2 in it and 55 billion cubic meters of methane at the bottom. Even the slightest earthquake may cause a huge explosion capable of evaporating over 2 million people living around Kivu.
Bonus: water creatures
If you ever decide to swim in a river, lake, or just about any other body of water, make sure to check if it is safe to bathe there, because even places that attract tourists may well be infested with lampreys, hagfish, leeches, or other unpleasant fauna. Look up the water you’re about to plunge into on the web and stay safe!
Preview photo credit Dave Herasimtschuk | FI | NAIAD.org