21 Dark Unsolved Mysteries That Will Probably Never Get Solved

Someone out there must have answers?!

Warning: Graphic content ahead, viewer discretion advised.

We recently asked the BuzzFeed Community to tell us what unsolved mystery keeps them up at night. Here are the bone-chilling results...

1. The disappearance of Bobby Dunbar who was "returned" to his family, but turned out to be another child.

en.wikipedia.org

"I just find it crazy that we’ll never quite know if the kid who was returned to the Dunbars was really their son or the son of another woman who they won against in court. If that wasn’t Bobby, what happened to Bobby? And if it was Bobby, why did he seem so confused about it?"

—justinea4f6d1b8aa

2. The mystery of the Somerton Man, an unidentified man found dead in Australia who had a scrap of paper with "tamám shud," meaning "ended" or "finished" on it.

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en.wikipedia.org

"The dude from Australia! The Somerton Man! He was found on the beach, dead. All signs pointed to poisoning but they didn't find anything in the tox report. All the tags in his clothes were cut out, there was no way of identifying him. Then they found a line from a book in his pocket or something. They say he could have been a spy but we'll probably never know."

—jennyr4f9257e67

3. The Yuba County Five who all had mild mental or psychiatric issues and mysteriously went missing.

Top Mysteries / Via youtube.com

"Five young men went missing in California after seemingly being chased up a mountain in their car. Months later, four of their five bodies were found malnourished, but the fifth has never been found. People think since the men were mentally challenged they were targeted or that the 5th man murdered them, but that theory seems unlikely."

—stormit2

4. The death of Rebecca Zahau who was found at her millionaire boyfriend's home.

ABC / Via youtube.com

"She was found bound and hanged naked off the balcony of her boyfriend’s beachside mansion. There was a mysterious message written in black paint on her bedroom door reading, “She saved him. Can you save her?”

—intheclouds03

5. The Black Dahlia whose murder in 1947 became highly publicized due to the graphic nature of what happened to her.

Bettmann / Bettmann Archive, Archive Photos / Getty Images

"This one is obviously super well known but the fact that no one knows who the killer is is wild and what was done to her was so brutal and creepy."

—brookem1828

6. The case of Timmothy Pitzen who disappeared after his mother's body was found with a note saying Timmothy was OK and would never be found.

True Crime Daily / Via youtube.com

"Everyone needs to read this case, it is nuts. Amy Fry-Pitzen checked her 6-year-old son out of school and three days later her body was found in a hotel where she had died of apparent suicide. A note was found next to her saying that Timmothy was safe with people who would care for him and he would never be found. They have never been able to find him, or any remains of him."

—brittdiane

7. Australia's serial rapist, Mr. Cruel who has never been caught.

en.wikipedia.org

"Many people have seen the police sketch of the modified balaclava that he wore in one of the kidnappings (the one with white stitches to conceal any potential identifying markers — super creepy!), but his crime spree and its sudden stop is haunting. Its unsolved nature adds more to its overall creepiness."

—wildfireswithin

8. John Anglin, Clarence Anglin, and Frank Morris's disappearance from Alcatraz prison in 1962.

Denver Post / Getty Images

"Along with their friend Allen West, they planned to dig a hole using spoons into their cell walls and climb up the walls onto the roof. Using loads of raincoats they also planned to take all their belongings and make a raft and swim away. West never made it as his hole was too small, but the others have still not been found. There are many weird things involved in this story —  someone claiming to be Clarence wrote a letter to the police a few years back stating he is alive and that he would tell them where he is if they didn't arrest him and that the other two have died."

—rayabhuiyan5

9. The Lane Bryant murders — the shooter still remains unknown.

ABC7 Chicago / Via youtube.com

"It happened on a Saturday morning in the southern suburbs of Chicago. A person walked into the store, held people hostage for a short time, and murdered everyone in there. The person got away and was never found. A manager, who wasn’t even scheduled to come in that day, called 911 and just said, 'Lane Bryant, hurry.' One person survived the shooting but the person has not been identified. They’re not even sure if the killer was a man or a woman. The 911 call is super chilling."

—angelac43c1b89c8

10. Susy Tomassi an older woman with dementia who disappeared one day and has not been found.

WPTV News / Via youtube.com

"Susy was 73 years old with slight dementia. She owned a restaurant called The Quilted Giraffe with her husband and was known for walking from the restaurant to other stores. One day, she was seen on camera walking away from her restaurant and literally just vanished. Nobody knows what happened. They recently released a video of a person they believe to be Susy, walking through some store alleys and getting into a white pickup truck the exact time she went missing."

—pattiecolvin23

11. The death of Gareth Williams, a British intelligence employee who was possibly assassinated.

Ben Stansall / Getty Images

"The spy in the duffel bag. His naked remains were found in a duffel bag, padlocked from the outside, in the bath of a safe house. No forensic evidence was found that pointed towards it being an accident, and the key to the padlock was found underneath his body. The official cause of death was ‘probably an accident’ but a KGB agent claims he was killed by the Russian SVR."

—lucyfiona

12. The Sodder Children disappearance whose bodies were never found after a house fire.

en.wikipedia.org

"The whole case is quite the rabbit hole with so many lies and cover ups and unanswered questions. Someone out there has answers! It’s been over 70 years, so if the children survived, they've probably passed on now. But I’m still so curious about what happened!"

—jacquelyntaylor413

13. The Dyatlov Pass incident where nine people died in the mountains of Russia under mysterious circumstances.

en.wikipedia.org

"Nine experienced trekkers were found dead. There was no sign of foul play, but most of them were missing clothes, some of them had extreme injuries, and the tents were ripped open from the inside. It happened over 50 years ago and to this day is still unsolved!"

—lydiai40b72ebb3

14. The death of JonBenét Ramsey, a 6-year-old child pageant queen in 1996.

Ray Ng / The LIFE Images Collection via G

"ARE WE EVER GOING TO FIND OUT WHO DID IT?! Did the mom write the ransom? Why was the random note written at the house? Why did JonBenét have pineapple in her stomach? Who gave her the pineapple? How did the DNA on her clothing get there, who does the DNA belong to? Was she being abused? WHY DOES HER BROTHER SOUND SO CREEPY AND WHY DOES HE SMILE SO MUCH?! Someone in that family is guilty of something. Darnit! It still keeps me up at night."

—jennyr4f9257e67

15. The deaths of of Kris Kremers and Lisanne Froon who went on a hike in Panama and never returned.

Rodrigo Arangua / Getty Images

"Kremers' phone was found and showed 77 attempts to emergency services and had numerous strange pictures on it. Their bones were later found, seemingly bleached, and according to a forensic anthropologist had no marks on them. I usually don't find disappearances that creepy but this one always sends a chill up my spine. You have to wonder what happened to them. If they called emergency services 77 times in the space of three days, it must have been really *bad*. Imagine being in a state of terror for that long..."

—n48656c421

16. The disappearance of Corrie McKeague, an RAF gunner who was last seen on CCTV.

Christopher Furlong / Getty Images

"He went missing in Bury St Edmunds in the UK about three years ago. He literally vanished without a trace. The theory is he was in a bin and his body ended up in a nearby landfill, but police spent three months and over £1 million searching the landfill and have found no trace whatsoever of his body."

—petdragon

17. The disappearance of Amy Lynn Bradley who went missing during a Caribbean cruise.

en.wikipedia.org, Lifetime / Via youtube.com

"She disappeared on a cruise ship and there were rumors that she was trafficked. They found a photo of a really similar looking woman on an escort site!"

—helenavanh

18. The Oakland County child killer case from the '70s that has had many suspects over the years, but is still an unsolved case.

en.wikipedia.org

"I grew up one county over from Oakland County, so I think the Oakland County child killer case pretty often. I can't help but wonder if the killer is still alive and still in Michigan."

—hello___heidi

19. The disappearance of Kyron Horman that sparked the largest criminal investigation in Oregon history.

en.wikipedia.org

"He was a 7-year-old boy, and his stepmom, Terri, walked him part of the way to his class before school, but he never made it to his class and he's still missing to this day. Many believe Terri did it but there are a lot of plot holes that suggest she couldn't have. Also, there's evidence to suggest that she actually hired a hitman to kill her husband, Kyron's father, prior to the incident. This one is also creepy to me because this was local for me, I was around Kyron's age and I had actually met him a few times."

—cssc201

20. The disappearance of Jesse Leopold who vanished without a trace just a few years ago.

KCCI / Via youtube.com

"He worked in Jewell, Iowa and disappeared in 2016 while running an errand during one of his work breaks. His truck was found two days later abandoned in Ledges State Park. Multiple police departments, search dogs, the DNR and members of the community searched all through Ledges and even in the Des Moines river but he was never found. The dogs never even picked up his scent outside of the truck found there."

—allic1997

21. Finally, the widely publicized Madeleine McCann case who went missing from her bed in 2007 while her family was on vacation in Portugal.

en.wikipedia.org

"I watched the documentary that came out not too long ago and it shook me to my core because they were so close but so far to finding her and it still bothers me since she probably won’t be found."

—kathryn9300

Submissions have been edited for length and/or clarity.

What other unsolved mysteries keep you up at night? Tell us below!