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Unexplained Mysteries Around the World (Besides the Bermuda Triangle)

We know there are questions around travel amid the coronavirus (COVID-19) outbreak. Read our note here.

To travel is to embark on new adventures, and the places we visit are often steeped in history, folklore, and legends. For example, many have long been fascinated by the unexplained disappearance of planes and ships in the Bermuda Triangle. The Triangle only scratches the surface of dozens of travel mysteries that exist around the world. From a debated ascent of Everest in 1924 to a European castle erected over the supposed “gateway to hell,” here are five travel mysteries for you to debunk.

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The Depopulation of Easter Island

Moai statues on Easter Island.
Credit: tankbmb/ iStock

Situated 2,300 miles west of Chile is the remote Rapa Nui (Easter Island). No written historical records exist of the island; however, it's commonly agreed that seafaring Polynesians settled here sometime between 800 and 1200 A.D. The island is famous for a collection of around 900 moai statues. These stone-carved figures of elongated human torsos stand in rows on cliffs, hillsides, and shorelines, most of them with their backs to the sea. The average moai is 13 feet tall and weighs 14 tons; the tallest is a whopping 72 feet high. Archaeologists believe that the colossal statues portray gods and tribal leaders; it’s also thought that ropes and trees were used to move and position the statues upright.

While the moai have long intrigued researchers, what has puzzled them more is the rapid demise and depopulation of the island. When Dutch explorer Jacob Roggeveen arrived here in 1722, he encountered 3,000 or more islanders living in a flourishing and developed society. In 1774, Captain James Cook visited the island and reported around 700 islanders. By 1877, only 111 inhabitants remained. Deforestation, cannibalism, the introduction of the Polynesian rat, warfare, and the slave trade are all possible theories for the dramatic change in fortune; however, anthropologic, archaeological and historical research is yet to uncover the truth.

4

The Disappearance of Aviation Pioneer Amelia Earhart

Amelia Earhart in her Lockheed L- 10E Electra prepares for 27,000 mile globe flight.
Credit: Everett Collection/ Shutterstock

On May 20, 1932, Amelia Earhart took off from Harbour Grace, Newfoundland, in her Lockheed Vega 5B aircraft and flew for almost 15 hours to Derry, Northern Ireland. In doing so, she became the first female aviator to fly solo across the Atlantic Ocean. Almost three years later, she was the first aviator to fly solo from Honolulu, Hawaii, to Oakland, California. Fueled by her success, Earhart began making preparations to circumnavigate the globe — what was supposed to be a 29,000-mile world record.

Following a failed first attempt, Earhart and her navigator Fred Noonan departed from Miami on June 1, 1937. On June 29, they landed in Lae, New Guinea, after flying almost 22,000 miles. They took off from Lea three days later on the first leg of the 7,000-mile journey across the Pacific to the U.S., but Earhart and Noonan tragically disappeared en route to Howland Island.

Despite extensive search parties and millions of dollars in funding, the Lockheed Elektra wreckage has never been found. The most likely explanation is that extreme weather conditions and a lack of fuel forced the plane to crash-land and sink in the Pacific.

However, conspiracy theories abound — some say Earhart was taken hostage by the Japanese, while others believe she worked as a spy for President Roosevelt and later returned to the U.S. under an alias. In 1991, an aluminum map case thought to be debris from the aircraft washed up on Nikumaroro, an atoll of the tiny South Pacific island nation of Kiribati. Could Earhart and Noonan have perished on the uninhabited island after living as castaways? The lack of any real evidence only adds to the mysterious legacy of one of the world’s greatest aviators.

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Houska Castle and the Gateway to Hell

Houska Castle and the nearby countryside in the Central Bohemian region in the Czech Republic.
Credit: mareksaroch.cz/ Shutterstock

Houska Castle stands on a clifftop surrounded by dense forests about 40 miles north of Prague, Czech Republic. Built in the 13th century by Bohemian King Ottokar II, the Gothic castle subsequently passed between the hands of several aristocratic families. While it appears like a noble mansion from the outside, the structure has a number of peculiarities that have inspired spine-tingling folklore. It has fake windows, no water supply, no fortifications, and is far removed from any notable trade routes. It also had no known occupants at the time of completion. So why make the effort to erect a castle that serves no obvious purpose?

According to historians, Houska Castle was built by Ottokar II as an administrative center, yet local villagers might tell you otherwise. As the legend goes, the castle was instead built to trap demons, and it stands over a hole that is believed to be the gateway to hell — so deep that it’s impossible to see the bottom.

During construction, prisoners were offered pardons if they consented to being lowered to the bottom to document their findings. Reports of half-human, half-animal creatures climbing out of the hole were common, as were black-winged beasts that dragged people into the abyss. Consequently, the castle chapel was built to cover the supposed demonic gateway and prevent evil from escaping. This, however, hasn’t stopped claims of screams and scratching claws coming from the castle floors — making the site one of the most haunted places in Europe.

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Mallory and Irvine’s Everest Ascent

Mountaineers climbing Everest.
Credit: sansubba/ iStock

In May 1953, New Zealand mountaineer Edmund Hillary and Sherpa Tenzing Norgay reached the top of Mount Everest. Their groundbreaking climb to the 29,035-foot summit made them the first people to officially stand atop the world’s tallest mountain.

Rewind to 1924, however, and the fatal expedition of British climbers George Mallory and Andrew Irvine leaves open the question of the date of the first Everest ascent. Mallory and Irvine were last sighted by fellow climber Noel Odell on June 8, 1924 at the Second Step, just 820 vertical feet from the summit. About an hour later, an intense snow squall obscured Odell’s view, and the mountaineers were tragically never seen alive again. Did they make it to the top? Why did they vanish without trace? How did they scale the infamous Second Step, which wasn’t officially climbed until 1960 with far more advanced equipment?

A breakthrough in this Everest mystery was the 1999 discovery of Mallory’s body during an expedition to search for the missing mountaineers. The corpse showed signs of injuries from a fall that would have left him unable to continue on foot. His rib cage was compressed by a rope, thus suggesting that Mallory and Irvine were attached at the time of the fall. Gone from the body was a photo of Mallory’s wife, Ruth Dixon Turner, that he had promised to leave at the summit. Despite rumored sightings, Irvine’s body is yet to be found. In 1979, Chinese climber Wang Hong-boa told a Japanese expedition leader of Irvine’s whereabouts. Unfortunately, Wang was killed by an avalanche the following day before the specific location was divulged. Also missing are two Kodak Vest Pocket cameras owned by Mallory and Irvine. If discovered, the cameras could once and for all confirm what the mountaineering world has waited almost a century to know.

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Australia’s Morning Glory Cloud

View of rare morning glory cloud.
Credit: Auscape/ Getty Images

Located along the Gulf of Carpentaria in a remote corner of North Queensland is the outback town of Burketown, Australia. For much of the year, this coastal settlement of just a few hundred residents is visited by anglers in search of Australian barramundi (also known as Asian sea bass).

That changes in September and October, when crowds gather instead to witness a spectacular meteorological phenomenon called the Morning Glory Cloud. It’s a wavy and snake-like roll cloud that can reach heights of up to 1.2 miles and stretch over 600 miles long. Meteorologists have studied this mystical atmospheric wave extensively, but still aren’t exactly sure what causes it — or why it’s only regularly observed in this remote stretch of Australia. One possible explanation is that it occurs when a humid easterly front of the Coral Sea converges with a warm westerly front from the Gulf of Carpentaria. It can take the form of a single cloud or appear as up to 10 individual clouds passing eerily above the skies of Burketown.

The Indigenous Gangalidda Garawa peoples  all the cloud Mabuntha Yipipee and believe that it was created by Walalu, the aboriginal Rainbow Serpent. Daredevil pilots from the region also worship the cloud and take to the skies to ride the wave when it comes around. They gather at the Burketown Pub in the hope of seeing the bizarre signs that signal the cloud is on its way — the pub’s fridges reportedly frost over and the table corners curl upwards. Whatever explanation they believe, the cloud attracts many thrill-seekers who can opt to see it from above — a local aviation company offers cloud flights and the chance to ride the wave on a hang-glider.

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