The Taos Hum: the locals have been hearing what sounded like a diesel engine, hence the name the Taos Hum. What’s more mysterious is that different sound detection devices have not been able to pick the sound.
Voynich Manuscript: experts have been trying to decode this manuscript but have been unsuccessful so far. World War I and World War II code breakers have been at it several times but none of them managed to decipher the language in which the manuscript is written.
Jack the Ripper: he was never identified. It is said that this man killed 11 women in the east end of London in the 1800s. Many of the victims were prostitutes.
Bermuda Triangle: everyone has heard about this mysterious triangle. The Bermuda Triangle is is formed by three places: Puerto Rico, Bermuda and Miami. Many ships were said to have been lost here. The mystery has never been solved.
Kryptos: you will find this just right outside of the CIA headquarters. It is a captivating sculpture with encryption on its surface. There are four encrypted messages of which three have been decoded. The fourth one remains a mystery.
Shepherd’s Monument Inscription: many intellectuals have attempted to decipher the code on this monument. However, nobody has been able to decode this inscription yet, DOUOSVAVVM. The monument has been a mystery for 250 years now.
Tamam Shud: a man found dead in Somerton Beach (Adelaide, Australia) had a piece of paper in his pocket with the words “Tamam Shud”. To this day nobody knows who this man was and why he had this paper in his pocket. It remains one of Austrlia’s profound mysteries.
Zodiac Letters: the killer was popular between the 1960s and the 1970s in the San Francisco Bay area. He was identified as the Zodiac killer because he used to send mysterious letters to the authorities and the media.
Georgia Guidestones: it is also known as the Stonehenge, American version. You can find these stones in the Elbert County. They were only erected in 1979. On the walls you can find the 10 new commandments – which are written in different languages, including Hindi and English. But up to now, no one knows for whom they were meant or why they are there.
Rongorongo: this is a system of glyphs found on Easter island that remain a mystery. However, it is believed that they contain hints or clues about the huge heads to be found around the island.
The Loch Ness Monster: for many years, this creature has been boggling the minds of people. Pictures have been taken of the beast but up to now, nobody has been able to provide substantial proof of Nessy!
Bigfoot: Bigfoot has been one of the most feared creatures of all times. At first glance, the creature may seem like a gorilla, but its posture and height make him much more than that… A scary man-beast roam in American forests! It is also known as the Sasquatch in the snowy mountains of Canada and US.
Black Dahlia Murder: no one knows who killed her. This murder is an unsolved mystery that has been puzzling the minds of many for years. At that time, Elizabeth Short, 22, was promoting herself into showbiz.
Stonehenge: this is one of the biggest mysteries of all time because no one knows why it was created in the first place.
Shroud of Turin: it is believed that the face could represent Jesus of Nazareth, but no one can confirm it. The mystery has been a focus of research for many years, but up to now, the mystery is still unsolved.
The Lost City of Atlantis: many think that it was Neptune’s crowning city. Legends tell it was inhabited by mermen and mermaids. But until now, no one knows if this city actually existed.
Extraterrestrials: men have always been fascinated by the outer space. Extraterrestrials are said to be living in the vast universe. However, a conclusion is still yet to be reached up to this day whether life outside Earth exists.
Severed Foot Beach in British Columbia: several severed feet have been found floating on one beach in British Columbia. It is still unknown whom the majority of the feet belonged to.
Wow! Signal: Jerry R. Ehman did not expect to pick up a radio frequency that was believed to have come from outer space, from the Sagittarius constellation. He was never able to find it again.
DB Cooper: when he hijacked and took away $200,000 from Boing 727, he jumped out of the plane. However, he went missing and was never found. It is one unsolved mystery in the history of US aviation.
Lal Bahadur Shastri: his death remains a mystery. Some say he died of heart attack. But doctors confirmed that his heart was okay. Until now, the reason of his death is still unknown.
Nazca Geoglyphs: these glyphs are huge representation of different objects. It is unknown why and how these drawings were made. The glyphs include monkeys, sharks, flowers and orcas and so many more…
SS Ourang Medan: up to now, there is no conclusion on what happened to the SS Ourang. It remains one of the most mind-boggling mysteries of all time in seafaring history.
Aluminum Wedge of Aiud: this unsolved mystery was one that dumbfounded many researchers. Aluminum isn’t easy to create even by the standards of the 19th century. The age of this wedge has been dated to be as far back as 2.5 million years ago.
Mackenzie Poltergeist in Greyfriars: tourists who join tours to the Greyfriars Kirkyard experience scratches, bruises and some of them even faint.