Buzz
The recent identification of three peculiar holes in Siberia has left scientists perplexed, conspiracy theorists thrilled, and the general public reconsidering the stability of the ground we walk on. The Earth's surface is dotted with various holes—some on land, some underwater, and some that serve as gateways to entirely different realms.
10. The Mysterious Holes of Siberia
Three recently discovered holes in Siberia have sparked widespread curiosity. The first, measuring approximately 50–100 meters (165–330 ft) in diameter, features a lake at its base. The second, located miles away, is roughly 15 meters (50 ft) wide. The third, stumbled upon by reindeer herders, is an almost perfectly conical hole about 4 meters (13 ft) wide and 60–100 meters (195-330 ft) deep.
The presence of debris and dirt encircling each hole suggests they were formed by an explosive force originating from within the Earth. While some attribute this to the gas industry in the region, the holes' distance from gas lines has led scientists to dismiss this theory. Other speculations range from stray missiles and pranksters to the ever-popular theories of extraterrestrial involvement.
The actual cause might be more earthly yet equally peculiar. One leading theory suggests these holes are a type of reverse sinkhole, a phenomenon not yet officially documented in scientific literature. Instead of collapsing inward, these holes are believed to form due to underground collapses triggered by melting permafrost. Natural gas then fills the cavities, and when pressure builds to a critical point, it forces dirt and debris to erupt outward rather than sinking into the void.
Some locals claim the holes have existed for years, and scientists concur, noting that the vegetation growth around them suggests they could be several years old. The second hole, found on a peninsula nicknamed “the end of the world,” was reportedly spotted by residents as early as September 2013. However, eyewitness descriptions vary, with some recalling an explosive event from the ground and others insisting they saw something descending from the sky.
9. The Kola Superdeep Borehole
Not every hole in the Earth’s crust is a natural or enigmatic phenomenon. Between 1970 and 1994, Russian geologists embarked on a scientific endeavor to dig the largest hole ever seen, resulting in the Kola Superdeep Borehole. This monumental project reached an astonishing depth of 12 kilometers (7.5 miles).
During the excavation, researchers made remarkable discoveries. Drilling through rock at such depths is akin to traveling through time. Scientists uncovered remnants of life that thrived on the surface two billion years ago. At an incredible depth of 6,700 meters (22,000 ft)—equivalent to stacking 22 Eiffel Towers—biologists identified microscopic plankton fossils. While encountering various rock layers was anticipated, the survival of delicate organic compounds under the immense pressure of overlying rock formations was nothing short of extraordinary.
Analyzing intact rock cores presented significant challenges. Once freed from the extreme pressures of their depths and exposed to cooler temperatures, the extracted rock samples began to deform. Although scientists anticipated rising pressures and temperatures with depth, they were surprised to find temperatures far exceeding predictions: at 10,000 meters (33,000 ft), temperatures soared to 180 degrees Celsius (356 °F).
Unfortunately, drilling was halted when the heat became unmanageable. The borehole remains near the Russian town of Zapolyarny, now sealed with a metal cap.
8. The German Continental Deep Drilling Program And The Pulse of the Earth
In 1994, drilling ceased on the German superdeep hole, a project initially envisioned as one of the most groundbreaking geoscientific endeavors. Its purpose was to enable researchers to investigate phenomena such as stress impacts on rock layers, anomalies in the Earth’s crust, the crust’s structural composition, and the conduction of heat and stress through it. The $350 million initiative resulted in a 9,100-meter (30,000 ft) deep hole near Windischeschenbach, Germany, with temperatures reaching 265 degrees Celsius (509 °F).
While numerous scientific experiments were conducted, Dutch artist Lotte Geeven pursued a unique goal: capturing the Earth’s sounds. Initially dismissed by scientists who claimed it was silent underground, Geeven persisted. She deployed a geophone into the hole to record ultrasonic waves undetectable to human ears. By processing the data through software to convert it into audible frequencies, she unveiled the Earth’s sounds. Described as resembling distant thunder, the recordings also evoke an uncanny resemblance to a heartbeat.
7. Dead Sea Sinkholes
The exact number of sinkholes around the Dead Sea remains unknown, but estimates suggest 2,500 have formed since 1970, with 1,000 appearing in just the last 15 years. Similar to the Siberian holes, these sinkholes signal significant environmental shifts.
Fed by the Jordan River, the Dead Sea receives less water each year. It has shrunk to about one-third of its 1960s size, leading to the formation of sinkholes and the decline of once-thriving lakeside resorts, now stranded miles from the water. As the lake’s saline water retreats, freshwater moves in, dissolving the salt-rich ground and causing it to collapse.
The Dead Sea has always undergone transformations. Once connected to the Sea of Galilee, this link vanished around 18,000 years ago. Today, human activity drives most changes. Water that once sustained the sea is diverted across Jordan and Syria, leaving it with only 10 percent of the inflow needed to maintain its size.
Once a revered destination for religious pilgrimages and seekers of its healing waters, the Dead Sea now features warning signs about sudden sinkholes. On a lighter note, if a sinkhole swallows you, it will be named in your honor.
6. Dean’s Blue Hole
The deepest known underwater sinkhole is Dean’s Blue Hole in the Bahamas, plunging an impressive 202 meters (663 ft). This makes it over twice as deep as most other blue holes, earning it a reputation as a top destination for professional divers.
In 2010, William Trubridge achieved a record by diving 101 meters (331 ft) into the hole without supplemental oxygen or equipment. Tragically, a Brooklyn diver attempting to surpass this record in 2013 lost consciousness after resurfacing following a dive lasting over three and a half minutes. The site also hosts Vertical Blue, an annual event drawing more than 30 divers to compete in various free-diving challenges.
While Dean’s Blue Hole attracts thrill-seekers globally, locals from Clarence Town and Long Island often avoid it due to legends claiming it was dug by the devil, who supposedly lurks there, pulling swimmers to their doom. Divers who venture into the hole encounter a stunning variety of marine life, including schools of fish and inquisitive sea turtles fascinated by the unusual visitors in their tropical haven.
5. Mysterious Sinkholes of Mount Baldy
In 2013, a six-year-old boy exploring Mount Baldy’s sand dunes in Indiana Dunes National Park was suddenly engulfed by a sinkhole. After being trapped under 3 meters (11 ft) of sand for three hours, he was rescued. Since then, similar sinkholes have been appearing unpredictably.
Geologists remain perplexed by the phenomenon at Mount Baldy. Since the area consists of sand, which doesn’t form air pockets, the typical conditions for sinkhole formation are absent. Remarkably, these sinkholes vanish within a day as surrounding sand fills them in. Ground-penetrating radar has provided no explanations.
A year after the first sinkhole appeared, they continue to emerge so frequently that the park remains closed. To stabilize the dune, grasses are being planted to combat erosion and ground movement. Some experts speculate that the dune’s instability may be linked to its historical use, including supplying sand for Mason jar production.
4. The Devil’s Sinkhole
Located in Edwards County, Texas, the Devil’s Sinkhole is a vast underground chamber with a 15-meter (50 ft) wide entrance leading to a 106-meter (350 ft) deep cavern. It serves as a critical habitat for one of the largest colonies of Mexican free-tailed bats. Although visitors cannot enter the cavern, they can witness over three million bats emerging from the sinkhole each night during the summer.
The sinkhole’s history is enigmatic. Before becoming a protected site, it was plundered by treasure hunters and artifact seekers, who discovered arrowheads and dart tips dating back to 4000–2500 B.C. Later, it provided shelter for cowboys and others with dubious intentions. Much of its history was lost when bat guano was harvested for fertilizer, making it nearly impossible to reconstruct the cavern’s past.
3. The Son Doong Cave
Although primarily a cave system, Vietnam’s Son Doong is accessible through several large surface openings. First explored in 2009 after a local farmer stumbled upon one of these holes, the cave was so deeply hidden in the jungle that its discovery seemed almost accidental. When the British Cave Research Association ventured inside, they encountered something truly awe-inspiring.
Declared the world’s largest cave, Son Doong was formed between two and five million years ago by an underground river eroding limestone. In some areas, the erosion neared the surface, causing parts of the cave roof to collapse and create additional openings. These holes let in enough sunlight to foster the growth of a vast jungle within the cave. Features include a 60-meter (200 ft) calcite wall, an underground river with waterfalls, and stalagmites and stalactites reaching up to 80 meters (265 ft) in length.
This subterranean jungle hosts a diverse range of wildlife, including venomous centipedes and whitefish. Enormous chambers large enough to accommodate an entire city block with skyscrapers, bamboo forests, and giant cave pearls add to its surreal beauty. This hidden world beneath the villagers’ feet proves that the age of exploration is far from over.
2. The Black Hole Of Andros
The Black Hole of Andros, found on South Andros Island in the Bahamas, stands out from other local holes due to its dark purple hue instead of the typical deep blue. This unique color results from a dense, toxic layer of bacteria about 18 meters (60 ft) below the surface, separating an oxygen-rich upper layer from an oxygen-deprived lower layer.
The island itself is largely uninhabitable, composed mostly of mud, making access to the Black Hole nearly impossible without specialized equipment such as helicopters. It was first explored by scientist and diver Steffi Schwabe, who became the first to navigate through the thick, murky layer of bacteria, described by a fellow diver as akin to swimming through paint. Below this layer, she discovered a thin band of clear water, followed by another purple layer resembling jelly.
The unusual water layers contain extremely high concentrations of toxic hydrogen sulfide. They also host bacteria that have thrived between these layers, preserving water conditions that have remained virtually unchanged for approximately billion years.
1. The Sawmill Sink
The Sawmill Sink, a blue hole in the Bahamas, holds significant scientific value beyond its appeal to extreme sports enthusiasts. It was the location of an archaeological excavation that has reshaped scientists’ understanding of the region’s landscape a millennium ago.
What makes the Sawmill Sink unique is that it was once dry but gradually filled with water as sea levels rose, preserving ancient bones within. Discoveries include fossils of a giant tortoise, previously thought not to inhabit the area, along with birds, seeds, flowers, and even plants with their green pigments and chlorophyll intact.
Among the most fascinating finds are the remains of giant crocodiles, believed to have been hunted by the area’s ancient inhabitants. The blue hole also revealed the remains of one of the earliest known Bahamian residents, dating back approximately 1,050 years.
+The Deluxe Mystery Hole
Even if you lack the funds or time to travel to far-flung destinations like the Bahamas, Siberia, or Vietnam, you can still explore fascinating holes. The Deluxe Mystery Hole, located near Oregon’s I-205 freeway, is touted by its owner as the state’s most remarkable archaeological site, hidden beneath a modest backyard garden. Using psychic archaeology, he claims to have uncovered wonders such as the Black Obsidian Mirror of a Higher Truth, the Door That’s Never Been Opened, the Mystery Tower, and the Giant Double Arch deep within the hole.
Reportedly estimated to be 5,000 years old, the hole’s custodian notes that with alien involvement, certainty is elusive. Visitors are exposed to the Enchanting Vapors of Encouragement, though a disclaimer clarifies they have no real effect. Don’t miss the Mystery Wishing Pipe or the chance to grasp the Mystery Pole. The site is owned by Pastor Barron, who identifies as the leader of the Tunnel People and head of the Universal Church O’ Fun. He also requests that visitors call ahead before arriving.
