00:00 From abandoned man-made mines to natural sinkholes and underwater pits, we reveal the deepest,
00:06 most dangerous holes on the planet that will make you think twice before taking that stroll
00:10 as they have swallowed machines, animals, and people.
00:14 Hello guys, welcome to another episode of Forever Green.
00:19 In this video, we explore the 10 most dangerous holes on planet Earth, and you should stick
00:24 around for number 1, as some of these Earth's deepest places have stories as dark as their
00:29 depths.
00:31 Number 10, Blue Hole, Red Sea.
00:35 Also known as the Diver's Cemetery, the Blue Hole is located in Dahab, Egypt with a depth
00:40 of 328 feet.
00:42 While diving in the Blue Hole might not be dangerous itself, this underwater sinkhole
00:47 has a unique feature which makes it incredibly lethal.
00:50 At around 181 feet down, there's a rock tunnel known as the Arch that connects the hole with
00:55 the Red Sea.
00:56 Because the water is so clear, light at the end of the tunnel makes the Arch look a lot
01:00 shorter than it really is, when in reality, the tunnel is 85 feet long.
01:05 This length, together with a current that constantly flows into the Blue Hole from the
01:09 Red Sea slows the progress down.
01:12 These factors make it so deadly for even the most experienced divers who attempt it thinking
01:16 it will be easy, unknown to them, for its deceptive length and current.
01:21 The Blue Hole is associated with a death toll of between 130 to 200.
01:26 A famous death here was 22-year-old Yuri Lipskis, who took a video camera with him descending
01:31 uncontrollably to the bottom.
01:33 Yuri, as seen in the footage, panics and tries to fill a buoyancy compensator, but he's too
01:44 deep and the pressure stops him from rising off the bottom.
01:48 These remains were collected the next day by deep-water diving specialist Tarik Omar.
01:53 Number 9.
01:54 Door to Hell, Gates of Hell
01:57 The Door to Hell in Derwiz, Turkmenistan is a Soviet experiment that turned out to be
02:02 bare unintended consequences.
02:04 In 1971, scientists initially wanted to use the remote desert site to drill for natural
02:09 gas.
02:10 The ground beneath, however, collapsed as the drilling rig hit a natural cavern filled
02:14 with gas and they had to stop the drilling.
02:17 The hole is approximately 230 feet wide and 65.5 feet deep.
02:22 Fearing the spread of poisonous gases into the surrounding towns, geologists intentionally
02:27 lit the natural methane gas by tossing a grenade into the hole, anticipating that it'd burn
02:32 off within a week.
02:33 That was more than four decades ago and it has, however, been burning continuously ever
02:38 since.
02:39 Its glowing is visible from Derwiz each night.
02:41 Fittingly, the name Derwiz means "gate" in the Turkmen language, so locals have dubbed
02:46 the burning hole the "Gate to Hell" and is actively being encouraged as a tourist attraction
02:51 site by the Turkmen government.
02:53 At night, camel spiders attracted to its light and warmth fall to their deaths in this pit's
02:58 fiery bowels.
02:59 And if you think this place is not dangerous, then number one will have you ossified.
03:05 Number 8.
03:06 The Kola Superdeep Borehole
03:09 The project to drill into the Earth's surface began near Murmansk in Purchensky District,
03:15 Russia in the 1970s when Soviet scientists wanted to learn more about the Earth's crust.
03:20 Over two decades, they managed to dig more than 39,600 feet (7.5 miles) into the Earth
03:26 so deep that if Mount Everest was placed into the hole, its peak would still be underwater
03:31 by more than 10,560 feet (2 miles).
03:36 The Kola Borehole is also further down than the wreck of the Titanic, which is 12,500
03:41 feet down into the ocean.
03:42 However, in 1992, they had to stop drilling because the temperature was around 180 degrees
03:47 Celsius, which was far much hotter than the scientists had projected it would be.
03:52 All this drilling wasn't for nothing though, as some scientific discoveries were made.
03:57 The researchers found out that there is water at 12 kilometers into the Earth's crust.
04:01 Additionally, they found 24 new types of long-dead single-celled organisms and gained access to
04:07 rocks that were 2.7 billion years old.
04:09 Hidden underneath this rusty lid is the Kola Superdeep Borehole.
04:13 If you fell down the hole, it would take around four minutes to reach the bottom.
04:17 Locals in the area say that the hole is so deep you can hear the screams of people being
04:22 tortured in hell.
04:23 Hence its nickname, "The Well to Hell."
04:26 Before we move on to our next most dangerous hole, leave us a like, smash that subscribe
04:30 button, and turn on notifications and you'll win 10 years of incredible luck.
04:35 7.The Devil's Sinkhole
04:40 The Devil's Sinkhole in Texas, USA, commonly known as the Satanic Sinkhole, is a huge vertical
04:45 cavern that reaches 400 feet down from a 50-foot opening.
04:49 Carved from water erosion over thousands of years, the Devil's Sinkhole's precise history
04:54 is still unknown to scientists.
04:56 However, artifacts found inside the cave date from 400 to 2500 BC.
05:01 Among the artifacts are arrowheads and burnt rocks suggesting that the hole might have
05:05 been used as a Native American burial site.
05:08 Three people are known to have died by falling into the sinkhole in modern times, with the
05:12 most recent in 1972, which led to the area being transferred to the state of Texas in
05:17 1985 and opened to the public in 1992.
05:21 Today, access to the area is only available through advance reservations.
05:25 Do you suffer from caroptophobia?
05:28 Then this is definitely not the tourist destination point for you, as the sinkhole is home to
05:33 more than 3 million Mexican free-tailed bats that, terrifyingly, emerge screeching from
05:38 the depths at sunset during April through October.
05:43 6.Dean's Blue Hole
05:45 Dean's Blue Hole, popularly known as the Deadly Diving Hotspot, located in Long Island,
05:52 Bahamas, is one of the deepest underwater sinkholes on Earth at 663 feet deep, taking
05:58 its name from a local Bahamian family.
06:01 At the surface, the Dean's Blue Hole has a diameter of 115 feet, but after descending
06:06 66 feet under, the hole winds considerably into a cavern with a diameter of 330 feet.
06:13 Formed over 15,000 years ago, Dean's Blue Hole is thought to be the result of a sinkhole
06:18 formed by rainwater soaking through cracks in limestone bedrock when sea levels were
06:23 lower.
06:24 The hole is visible above water because of the deep blue hue of its water, compared to
06:27 the light blue around it.
06:29 It's home to all sorts of marine life, including tropical fish, turtles, and seahorses.
06:34 Since April 2008, it has been the site of the Vertical Blue Free Diving competition.
06:39 Legend says that the hole was dug by the devil himself, and that he's still there, dragging
06:44 those that dare to swim there to their deaths.
06:46 In 2013, Nicholas Mavoli died shortly after surfacing from diving into Dean's Blue Hole
06:52 from a pulmonary edema, excess fluid in the lungs, the first death in an international
06:57 free diving competition.
06:59 In 2008, three women drowned when one fell into the hole and the other two were trying
07:04 to save her.
07:05 The youngest victim was just 14.
07:07 Cops arrived at the scene to find the three women's bodies floating by the shoreline after
07:11 the horrific accident.
07:13 Number 5 - Kimberley Mine
07:18 The Kimberley Diamond Mine in South Africa, also known as the Big Hole, is claimed to
07:22 be the deepest hand-dug hole anywhere in the world.
07:26 At over 700 feet, the Big Hole was excavated by 50,000 diamond miners with shovels and
07:32 pickaxes between 1871 and 1914.
07:36 It is so large that it is visible from space.
07:39 However, the operation didn't come without tragedy as between 1897 and 1899, 7,853 patients
07:47 were admitted to Kimberley Hospital following accidents on site.
07:51 At least 1,114 died, mostly from tuberculosis and other sicknesses caused by the horrendous
07:57 conditions the miners lived and worked in.
08:00 Legend has it that if you listened carefully while standing at the opening, you could still
08:04 hear the cries of the miners long gone.
08:07 After mining stopped, the hole became the most visited tourist attraction in the area
08:11 and today it has a museum just next door.
08:14 Number 4 - Berkeley Pit
08:18 The Berkeley Pit in Montana, USA is a 1,780-foot-deep abandoned copper mine and now one of the only
08:26 places in the world where you can pay to see toxic waste.
08:29 It was closed in 1982 and has slowly been filling with water ever since.
08:33 And because the rocks in the mine contain heavy metals and chemicals like sulfuric acid,
08:38 the site now holds back more than 6.5 trillion gallons of toxic, acidic copper-colored water.
08:43 In 2016, a large flock of several thousand snow geese landed in the pool pit to avoid
08:48 a snowstorm.
08:50 Worried officials tried to scare the birds out of the water and stop more landing but
08:53 eventually around 4,000 of the geese were killed by being exposed to chemicals in the
08:57 water.
08:58 Would you visit this toxic copper-colored lake?
09:01 Leave a like and let me know in the comments below.
09:04 Number 3 - Glory Hole
09:08 The Glory Hole is a spillway of the Monticello Dam, USA.
09:12 The Monticello Dam was completed in 1957.
09:16 Its function is to keep people safe by making sure water levels in Lake Berryessa don't
09:21 overwhelm the dam and cause floods.
09:23 Rather than spilling over the edge of the dam when the water grows higher, it is funneled
09:27 into a spillway.
09:28 The Glory Hole, which is 72 feet wide and 700 feet deep, can hold a maximum of 362,000
09:35 gallons of water per second.
09:37 Water only spills out into the Glory Hole when it reaches 15.5 feet above the level
09:41 of the funnel.
09:42 The last time this happened was in May 2006.
09:45 For Emily Schwalek, the 72-feet-wide drain was a deadly trap as the 41-year-old was swimming
09:51 in the lake in 1997 when she found herself being pulled towards the spillway after she
09:55 had crossed the buoy line designed to keep bathers out of harm's way.
10:01 Number 2 - Chand Bori
10:06 Built between 800 and 900 AD, Chand Bori in Abhinari, India, is one of the biggest step
10:12 wells in the world with a depth of 100 feet.
10:15 It was made to keep rainwater from the monsoon season for use at drier times of the year.
10:20 Three sides of the well have 3,500 steps that drop 100 feet down while the fourth side has
10:25 a temple to the Hindu god, Harshat Mata, the goddess of happiness.
10:30 Because of deadly accidents in the past, one now needs special permission to go down into
10:34 the bottom of the monster well.
10:36 Local legend even claims that the well was dug in a single night by ghosts.
10:40 But film buffs will better recognize it as Batman's prison in the setting of Dark Knight
10:45 Rises, as well as the scene for setting of The Fall.
10:48 It's now time for today's subscriber pick.
10:51 Today's photo was sent to us by a subscriber wondering about this gigantic, monstrous shark
10:55 that appears to be emerging from an underwater sinkhole.
10:58 If you come across a mysterious photo online and want us to look into it, just send it
11:02 over and we may even feature it on a future video.
11:06 Now, we looked into this picture and are excited to reveal to you that it is indeed the most
11:11 dangerous shark in the world, the bull shark.
11:14 Bull sharks are responsible for more documented attacks on people than any other species of
11:19 shark.
11:20 The famous blockbuster movie Jaws was actually inspired by a true story where several people
11:24 were killed by one or more bull sharks.
11:27 So be on the lookout when swimming out in the ocean.
11:30 Nonetheless, there is a sinkhole that comes very close to looking like the one in this
11:34 picture and that's...
11:36 Number 1.
11:37 Great Blue Hole 60 miles off the coast of Belize is the Great
11:42 Blue Hole, one of the largest sea holes in the world.
11:46 Also known as the Deep Blue Grave, the gigantic pit is almost 1,000 feet wide and over 400
11:52 feet deep and is home to reef and bull sharks like the one on the "Just Explained" subscriber
11:57 pics photo.
11:58 Originally, the Blue Hole was a limestone cave that started to form about 150,000 years
12:03 ago.
12:04 Gradually, the water level rose and the caves were flooded and its roof collapsed, forming
12:09 this unique hole.
12:10 The hole, a UNESCO World Heritage Site, is a popular scuba diving spot made famous by
12:15 Jacques Cousteau in the 1970s, who named it one of the best dive spots on the planet.
12:21 Last year, virgin billionaire Richard Branson went with Cousteau's grandson, Fabian, to
12:25 the bottom of the chasm in a submarine.
12:28 At the bottom, they found the bodies of two of the three divers who were thought to have
12:31 gone missing in the hole.
12:33 And that's it for the 10 most dangerous holes on planet Earth.
12:36 Which of these places got your heart racing the most?
12:38 Let us know in the comments below.
12:40 And if you liked this video, you should definitely check out our video on 12 most magical places
12:45 in the world.
12:46 [Music]
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