WARNING: This article contains mentions of death, bodily harm, and murder.

like proceed with caution.

1.The vanishing ofMary, Fannie, and Jessie Stuart.

Closeup of Robert Stack

Naotomo Umewaka / BBC / Viayoutube.comNow, the mystery lies inwhoorwhatexactly created it. Some believe that the perfect, shelf-like structures were crafted by nature, gradually building up over time and aided by the region’s frequent earthquakes. People in this school of thought oftencitethe Giant’s Causewayin Ireland as their “proof” — a similar, naturally-formed structure. Others, however, believe that the monument’s perfect 90º angles could only be manmade, perhaps by prehistoric civilization — likely the Jōmon people — who could have inhabited the area as far back as 12,000 BC.You can read more about the monumenthere.

The three did not make it home that night, so one of Mary’s friends reported them missing.

There was no sign of the family, nor were there indications of foul play.

2.The Great Kentucky Meat Shower, or the “Kentucky Shower of Flesh.”

Car with open door on a foggy road, person walking away, focus on roadside vegetation in the foreground

Two local men tasted the strange meat and believed it was either venison or mutton.

3.The Tunguska Mystery.

Some reported going unconscious and that their homes were destroyed.

Misty landscape with grass field, fence, and hills in the background

4.The mysterious green children of Woolpit.

The brother and sister duo spoke in an unknown language and refused to eat anything but raw fava beans.

Eventually, their skin lost its green color.

Three-panel image showing tree devastation patterns after the Tunguska event

5.The “Lost Girls” of Panama.

They were in the region to volunteer at a local school and learn Spanish.

Unfortunately, neither Kris nor Lisanne ever returned from that hike.

Two children and a dog sitting on a bench; a bucket is on the grass beside them

Search parties were sent out but came back empty-handed.

Kris’s pelvis was also discovered, split in two.

6.The whereabouts of Byron Preiss’s treasure.

Missing persons flyer with photos and descriptions of Kris Kremers and Lisanne Froon, contact numbers provided

7.The disappearance of Jodi Huisentruit.

Jodi was a morning news anchor at KIMT-TV a news station in Mason City, Iowa.

On the morning ofJune 27, 1995, Jodi didn’t show up to work.

Person's hand pointing to a poem on paper with shadowy light, text partially readable, about ancient wisdom and direction

A producer called her, and, frazzled, she said she’d overslept and would be in ASAP.

So, they called the police for a welfare check.

8.The Taos “hum.”

Television station KIMT building with a news vehicle parked in front. Posters in windows show support for a cause

How Taos differs, however, is that nobody has figured out where the sound is coming from.

9.The Rectangle Galaxy.

That galaxy is LEDA 074886, or the “emerald-cut galaxy.”

Mountain landscape at sunset with foreground of small town buildings

10.The disappearance of Tiffany Sessions.

She was never seen or heard from again.

Thirty-five years later, neither Tiffany nor her remains have been found.

Spiral galaxy surrounded by stars in space

11.The mystery of the Phaistos Disc.

In 1908, the disc wasdiscoveredinside the Minoan Palace of Phaistos in Crete, Greece.

The images are arranged into 61 total “groups,” separated by lines drawn between the images.

Person walking away on a paved path with greenery on sides

Many assume these groups are intended to represent words.

Loads of theories have been floated, ranging from it being a prayer to a curse.

12.The disappearance of Branson Perry.

Ancient disc with inscribed text on a stand, possibly used for ceremonial or informational purposes

He left all his belongings including his car behind.

13.And finally, the perplexing Yonaguni Monument.

It’s about50 meters by 20 metersin total and kind of looks like giant, carved steps.

Person holding jumper cables with a blurred car and person in the background

According to scientists, the “monument” is estimated to be over 10,000 years old.

Now, the mystery lies inwhoorwhatexactly created it.

you could read more about the monumenthere.