Imagine stumbling upon a lost world hidden beneath the Earth’s surface — an ancient, untouched forest thriving in complete secrecy.
Deep in southern China, scientists have uncovered a jaw-dropping discovery: a massive sinkhole, stretching 630 feet deep, sheltering a mysterious underground jungle.
A lost world
The world and nature continue to surprise us constantly. Just when we thought humanity had explored everything, new and amazing discoveries always emerge.
A remarkable discovery like this was made in 2022, and it shocked much of the world. Just the images of the gigantic hole in the rugged terrain are enough to make one’s mind spin, but it was far from just any cave or hole down there.
Deep in the Guangxi Zhuang Autonomous Region of China, a team of cave explorers stumbled upon something straight out of a fantasy novel — an untouched primeval forest thriving at the bottom of a giant sinkhole.
Measuring over 1,000 feet in length and plunging nearly 630 feet deep, this massive chasm is so vast it could swallow St. Louis’ Gateway Arch whole.
But what makes this sinkhole truly extraordinary isn’t its size — it’s what lies within.
Hidden beneath the Earth’s surface, an ancient world flourishes, untouched by modern civilization, and possibly home to species never before seen by science.
A descent into the unknown
The expedition team, led by seasoned cave explorer Chen Lixin, used the single-rope technique to descend a vertical cliff and rappelled over 328 feet into the sinkhole before embarking on a grueling hours-long trek to its floor.
What they found was nothing short of breathtaking.
Towering ancient trees, some reaching 130 feet tall, stretched their branches toward the sunlight filtering through the massive opening above. Beneath them, dense undergrowth grew so thick it brushed against the explorers’ shoulders as they waded through it.
After a few hours, the team finally reached a small flat patch of ground that marked the lowest point of the pit, like reaching the bottom of a vast, hidden bowl.
There, they saw a family of eagles soaring above, their wings cutting through the air like knives. The explorers, feeling a sense of awe and wonder, decided to name the sinkhole The Eagle, inspired by the majestic birds that seemed to watch over this mysterious, otherworldly place.
Drone footage
Footage from the journey, shared in a May 7 Twitter video, shows the explorers navigating the jungle-like terrain, carefully documenting their findings with drones. The sight of such an unspoiled ecosystem raises thrilling possibilities — could this sinkhole harbor plant and animal species never before recorded by science?
In June 2022, the team returned to The Eagle with an expanded group of scientists and a television crew. They explored three deep gaps in the sinkhole’s rock and discovered caves that had collapsed over time. Still, markings on the walls suggested the presence of an ancient underground river that had formed them.
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When the team descended into the vertical shaft southeast of The Eagle, they discovered a small underground lake with turquoise water, situated along the estimated path of the ancient river. Water, of course, often signifies the presence of wildlife.
“I wouldn’t be surprised if new species were discovered here,” George Veni, executive director of the National Cave and Karst Research Institute in the U.S., told AccuWeather.
While Veni was not part of the expedition, he emphasized that karst sinkholes like this one are often hotspots for biological and geological wonders.
A natural wonder formed over millennia
The sinkhole is believed to have formed within the past 100,000 years.
The landscape of southern China is well known for its karst topography, a terrain sculpted over millions of years by the slow dissolution of bedrock.
Rainwater, slightly acidic from absorbing carbon dioxide in the soil, seeps into cracks, gradually expanding them into tunnels and caverns. When these underground chambers collapse, massive sinkholes—known as tiankeng, or “heavenly pits” in Mandarin—are born.
Unlike in other regions where sinkholes might be small and barely noticeable, China’s karst formations are nothing short of awe-inspiring. The country is home to some of the world’s most dramatic sinkholes, including the record-breaking Xiaozhai Tiankeng, which plunges more than 2,000 feet into the Earth in Chongqing’s Tiankeng Difeng National Park.
More than just a hole in the ground
But sinkholes aren’t just geological curiosities—they play a vital role in the planet’s ecosystems. Karst aquifers, which lie beneath these massive formations, serve as primary water sources for nearly 700 million people worldwide.
However, their accessibility makes them vulnerable to pollution. Veni recalls pulling out car batteries, barrels of unknown substances, and other pollutants from cave streams, underscoring the need for conservation.
The newfound sinkhole in Leye County is the 30th discovered in the region, adding to China’s already impressive tally of geological marvels. With each discovery, scientists inch closer to unraveling the secrets hidden beneath our feet.
Could more undiscovered ecosystems be waiting below the surface? This hidden forest is a powerful reminder that the Earth still holds mysteries beyond our imagination—waiting for the right explorers to uncover them.
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