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In 2011, archaeologists rediscovered an ancient "gate to hell" in the city of Hierapolis, Turkey. This stone doorway leads to a small cave-like grotto and was once thought to be an entrance to the underworld. The gate, also called the Plutonium, sits above a fissure that releases deadly volcanic carbon dioxide (CO2). Visitors to the site in ancient times would see a visible mist of this gas rising from the ground. Even today, the area is dangerous—birds that fly too close to the gate suffocate from the toxic fumes. The city of Hierapolis is just one of many places on Earth where you aren't welcome, but can still check them out in our video. Credit:
CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0/:
King Farouk palace: By Redthunder22, https://commons.wikimedia.org/w/index.php?curid=35558298
Niihau helicopter: By Christopher P. Becker, https://commons.wikimedia.org/w/index.php?curid=116402239
Erdstall Ratgöbluckn Perg Durchgang: By Pfeifferfranz, https://commons.wikimedia.org/w/index.php?curid=18819687
Erdstall Perg: By Pfeifferfranz, https://commons.wikimedia.org/w/index.php?curid=13965248
Trca2: By Tomasz Majtyka, https://commons.wikimedia.org/wiki/File:Trca2.ogv
CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0:
Bhangarh: By Deejayrocks2, https://commons.wikimedia.org/w/index.php?curid=82674759
Shirazumori Shrine: By Fred Cherrygarden, https://commons.wikimedia.org/w/index.php?curid=149066912
Yawatano-yabusirazu Motoyawata: By しんぎんぐきゃっと, https://commons.wikimedia.org/w/index.php?curid=93493917
Blair Witch Project Logo: By Schreibwerkzeug, https://commons.wikimedia.org/w/index.php?curid=56293706
GuilfordCT Dudleytown: By Magicpiano, https://commons.wikimedia.org/w/index.php?curid=68150500
Erdstall Vorau: By Haweb, https://commons.wikimedia.org/w/index.php?curid=128796249
Hermann Schwammenhöfer: By Hermann Schwammenhöfer - https://www.academia.edu/70468036/Hermann_Schwammenh%C3%B6fer_Arch%C3%A4ologische_Denkmale_Weinviertel_Wien_2020_, https://commons.wikimedia.org/w/index.php?curid=130719435
FMP - Erdstall: By Wolfgang Sauber, https://commons.wikimedia.org/w/index.php?curid=69517607
Bhangarh Fort: By Chainwit., https://commons.wikimedia.org/w/index.php?curid=121287181
The Plutonium: By Carole Raddato, CC BY-SA 2.0 https://creativecommons.org/licenses/by-sa/2.0, https://flic.kr/p/Q35dZY
Erdstall waagrechter schlupf: By Josef Weichenberger, GFDL, https://commons.wikimedia.org/w/index.php?curid=29649747
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Transcript
00:00If you walk through this small stone doorway in Hierapolis, Turkey, you might never come
00:05back alive.
00:06Back in ancient times, people thought it was some sort of portal to the underworld.
00:11Romans would go in carrying perfectly healthy bulls, but after a few minutes, they would
00:15watch these animals collapse as if hit by some mysterious force.
00:20But what's even weirder is that nothing happened to people.
00:23They could walk in and out just fine.
00:25Now recent studies might have an answer for these eerie happenings, and it all has to
00:30do with people's heights.
00:33The gate, known as Plutonium, named after Pluto, the deity of the underworld, is a stone
00:38doorway leading to a small 32-square-foot cave.
00:42But the real danger is what is going on beneath it.
00:45Hierapolis is a super-active geological area, and there's a big crack under the city that
00:51constantly emits volcanic carbon dioxide, which comes up as a visible mist.
00:56During the day, the sun dissipates the gas.
00:59At night, the gas forms some kind of a carbon dioxide lake on the sheltered arena floor.
01:05At dawn, you need to get out of there before it's too late.
01:08This whole place can turn particularly life-threatening right before the sun rises, when the carbon
01:13dioxide concentration about 15 inches above the arena floor reaches 35%.
01:19That means birds, bulls, and even humans can suffocate and pass away in just a couple
01:24of minutes.
01:25But there is a scientific reason that explains how Romans could get out of there unharmed.
01:30The carbon dioxide concentration drops quickly with height.
01:34So animals perished while their handlers, being taller and standing up, could walk out
01:39and breathe safely.
01:42Most people can't stay inside the Begarn Fort after sunset.
01:47The 16th-century fort, located about 146 miles from Delhi, is known as one of the most haunted
01:53places in India.
01:55During the day, the area is bustling with visitors who can walk through the main gate
01:59of this once-grand fort city and check out the ruins of temples and palaces.
02:04But they will also see this big sign at the gate that dramatically warns everybody that
02:09all access is strictly forbidden after dark.
02:13That's probably because at night, according to locals, women can be heard screaming and
02:18crying in that place, along with the sounds of bangles breaking and strange music.
02:24Others have reported seeing shadowy figures and flashing lights among the ruins, or even
02:29smelling a strange perfume floating around.
02:32Yawatono-yobushirasu is one of Japan's most restricted forests, located in Ichikawa.
02:39The forest itself is a small area, covering just a little more than 40 square yards, and
02:44it is mostly a thick patch of mosu bamboo.
02:47Its location next to a parking lot and modern buildings makes it seem less intimidating,
02:53but don't be mistaken by its appearance.
02:56Since at least the 19th century, people have said that anyone who enters this forest is
03:00bound to disappear and never be seen again.
03:03So as soon as you arrive, a sign near the forest tells you about its history and the
03:09curse believed to be linked to it.
03:11Some rumors suggest the creepy presence of an ancient samurai lord walking around.
03:17Other legends say that the forest hides a bottomless pit filled with poisonous gas.
03:22Whether these stories are true or not, today, the area is enclosed by stone walls, and entry
03:27is still strictly prohibited.
03:30In a valley called the Dark Entry Forest in Connecticut, you will find Dudley Town, but
03:36you definitely shouldn't go inside.
03:38Not only has the land been private property since the 1920s, but it is also known as one
03:44of the spookiest places on Earth.
03:47This place was first settled in the early 1740s, and many of the original settlers were
03:52from the Dudley family, that's why it's called Dudley Town.
03:56There's a local rumor that the town's founders were descended from Edmund Dudley, an English
04:01nobleman who lost his life for treason.
04:05The legend says this curse followed the Dudley family all the way across the Atlantic to
04:09America, and their misfortune is said to be responsible for crop failures, mental problems,
04:16and several tragic incidents in the village.
04:18Again, it is all just rumors since historians haven't found any real evidence to support
04:23these claims.
04:24Still, the pitch-black surroundings and the eerie Blair Witch Project vibe going on in
04:30that place fueled ghost stories in the 1980s.
04:33This led to many cases of vandalism in the following decade, and because of that, the
04:38landowners closed the area to the public.
04:42This old abandoned building used to be the fancy palace of King Farouk's family, who
04:46was the penultimate king of Egypt back in 1936.
04:51After his family members passed away, the palace was turned into a morgue.
04:56Locals say that today, the whole place is super creepy and off-limits.
05:00Some people have reported seeing light bulbs flicker and shadows move around, making strange
05:05noises.
05:06Once, a group of kids allegedly went inside and totally freaked out when they found all
05:11the doors had suddenly disappeared, leaving them in complete darkness.
05:16They had no choice but to start screaming for help.
05:20This Hawaiian island has been off-limits to people for over a century.
05:25It's called Ni'ihau and is the smallest inhabited island in Hawaii, covering around
05:2969.5 square miles.
05:32It has around 84 residents.
05:34The island doesn't have cell phone service, paved roads, or power lines – just solar
05:39panels for electricity.
05:41A single family has privately owned the island since 1864, when a Scottish farmer bought
05:47it for $10,000, which would be around $250,000 today.
05:52The island has stayed in the family, passing down to its descendants, the Robinsons.
05:57They have kept it private ever since, so access is highly restricted and basically by invitation
06:03only.
06:04The Erdstal Tunnels are a network of about 2,000 mysterious underground passageways mainly
06:10found in Central Europe, especially in Austria and Bavaria.
06:14These tunnels are usually narrow and cramped, often just wide enough for one person to squeeze
06:19through at a time, and they are believed to date back to the Middle Ages, as far back
06:24as the 12th century.
06:26What's really puzzling about these tunnels is their purpose.
06:29Despite a lot of research, nobody really knows why they were built.
06:34There is a theory that they were used for storage, but since many of them are below
06:38the waterline and occasionally get filled with water, that doesn't seem very practical.
06:43These tunnels have very light, almost claustrophobic sections and sudden drops, which doesn't
06:48seem practical for other straightforward uses like escape routes, hiding places, or even
06:54spiritual purposes.
06:55To make things even more mysterious, there is a complete lack of artifacts, which makes
07:00it even harder for researchers to figure out what these tunnels were really for.
07:06Since 2019, adventurous people can get arrested if they try to climb this rock.
07:12Uluru, also known as Ayers Rock, has been off-limits because it is now considered a
07:17sacred site for local communities.
07:20But the fact that it is also extremely dangerous probably played a big role in the decision
07:25to close it off to visitors.
07:27This rock is 1,142 feet high, which is about the height of an 80-story building.
07:34The climb to the summit can be very slippery, and high temperatures, which can hit 116 degrees
07:39Fahrenheit in the summer, have led to people passing away from dehydration and heat-related
07:44issues.
07:46Something even creepier happens at the top of the rock right after storms.
07:50When it rains, small, tadpole-like crustaceans, called shield shrimp, hatch in temporary water
07:56holes and rock pools on top of Uluru.
07:59These extraterrestrial-looking creatures are about 3 inches long, and they spread their
08:03super-resilient eggs everywhere.
08:06When enough summer rain comes, they hatch and go wild, feeding on microorganisms and
08:11bacteria in the water.
08:13How these strange creatures end up in the fleeting pools on top of Uluru is still unclear,
08:19but the most likely explanation is that their eggs might travel there with the wind.
08:24That's it for today, so hey, if you pacified your curiosity, then give the video a like
08:29and share it with your friends!
08:30Or if you want more, just click on these videos and stay on the Bright Side!

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