From crocs to cannibals: the world's deadliest rivers

Cahills Crossing -
Cahills Crossing is located on the East Alligator River in Northern Territory, Australia. 

Cahills Crossing - People keep crossing it, despite the waters being infested with crocs. In fact, a 2016 survey found an average of 120 crocodiles in a 4-miles stretch! 

Congo River - Formerly also known as the Zaire River, the Congo River is the second-longest river in Africa. The river is teeming with dangers along its 2,900 miles.

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Congo River -
Not only are there deadly animals such as crocodiles, hippos, and snakes, you also have to survive the rapids known as the Gates of Hell.

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Congo River- And even if you manage to survive all of that, you'd still have to worry about cannibals from the Engombe tribe capturing you in a area known as "the abattoir."

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Rio Tinto -
This Spanish River is as close as it gets to being in Mars! Around 5,000 years of mining have contributed to its composition and dramatic color.

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Rio Tinto -
Rich in iron and heavy metals, Rio Tinto is extremely acidic. The water contains high amounts of iron and potassium sulfate compound, and methane.

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Rio Tinto -
But despite the extreme conditions, some microorganisms do live in the inhospitable river.

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Zambezi River -
This African river is home to around 90,000 hippos and 188,000 crocodiles, and other dangerous wildlife, such as river sharks.

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Zambezi River -
And if you happen to survive it all, you'd still have to worry about unexploded landmines and flooding. Yikes!

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Niagara River - You're probably familiar with the Niagara Falls, itself quite dangerous. So much so that since 1850, some 5,000 people have been recovered from its base.

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Niagara River -
But the Niagara River has more dangers, including rapids and the 125-feet-deep (38 m) Niagara Whirlpool, which has claimed many lives over the years.

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Boiling River -
This tributary of the Amazon River can be found in Peru. Its temperature varies, but it frequently reaches up to 200°F (93°C).

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Boiling River -
That's hot enough to boil you! Local shamans believe the river is the home of the mythological serpent Yacumama.

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