From boiling temperatures to most polluted: World’s most unusual rivers

Rivers have sustained civilizations and carved landscapes through time. Rivers are a reminder that nature is never ordinary. Here’s how: Rivers, while some are celebrated for their beauty, others stand out for their sheer strangeness. Be it the boiling hot river in the heart of the Amazon in Peru or one that looks like a bloody river (for a lack of a better word) in Spain, these rivers redefine what we think we know about flowing water. Here are ten of the world’s most unusual rivers.

The Shanay-Timpishka, better known as the Boiling River. Stretching for about 6 kilometres through the jungle, its waters reach temperatures as high as 93 degrees Celsius, hot enough to cook small animals instantly. Unlike most geothermal rivers that originate near volcanoes, this one is located hundreds of kilometers from any volcanic activity. Scientists believe the heat comes from geothermal vents deep beneath the Earth’s crust.

The Rio Tinto is one of the most visually striking rivers on Earth. Its deep red waters and orange-hued banks look like something out of a science fiction landscape. The river’s unusual colour and acidity come from iron and heavy metal deposits released by centuries of mining in the region.

Indonesia’s Citarum River has gained notoriety as one of the world’s most polluted. Flowing through West Java and serving as a lifeline for nearly 30 million people, the river has been suffocated by industrial waste, plastic debris, and untreated sewage for decades. From both far and near, this river resembles a floating landfill.

Few natural wonders can rival the surreal beauty of Cano Cristales, often called “The River of Five Colours.” Flowing through Colombia’s Serranía de la Macarena National Park, this river dazzles visitors from June to November, when aquatic plants known as macarenia clavigera bloom in vivid hues of red, pink, yellow, green, and blue. Take the flight to the small town of La Macarena, then from there, guided treks will take you to the river Cano Cristales.

In the Yucatán Peninsula, deep inside a cenote known as Angelita, lies a sight that seems straight out of a dream. An underwater river flows beneath the sea, and is actually a layer of hydrogen sulfide that separates fresh and saltwater, creating a dense, mist-like boundary that gives the illusion of a flowing stream.

Did you know that back in 2017, New Zealand made global headlines by recognising the Whanganui River as a legal person? Yes, granting it the same rights and protections as a human being and the works! This landmark decision stemmed from centuries of reverence by the Māori people, who view the river as an ancestor and a living entity. The river flows for 290 kilometres through the North Island, and passes through the lush forests, sacred sites, and remote valleys.

Montana’s Roe River once held the Guinness World Record for being the shortest river in the world. It doesn’t have the title anymore because the definition of a river is, unfortunately, not the same everywhere. So to avoid any confusion, the title was removed. Roe River flows a mere 61 metres (200 feet) from Giant Springs into the Missouri River. Visitors to Giant Springs State Park can witness this tiny yet charming waterway.