A Definitive List Of History’s Creepiest Cryptids — And Where They Allegedly Live

Published April 21, 2026
Updated April 22, 2026

Aspidochelone: One Of The Scariest Ancient Greek Cryptids

Aspidochelone

Warriors of Myth WikiOne of the oldest cryptids on this list, the aspidochelone was often described as a giant sea turtle or whale.

The myths of the ancient Greeks have been immortalized many times in popular culture. Whether it’s a Disney adaptation of Hercules or a reading of The Odyssey in a high school English class, most people in the Western world are, in some way at least, familiar with the stories of ancient Greece.

One less prominent story, however, is that of a sea monster known as the aspidochelone. Per Ancient Origins, there are two common interpretations of this cryptid’s appearance: either a giant turtle, or a giant whale.

The actual root of the word “aspidochelone” comes from the Greek aspis, meaning “shield,” and chelone, meaning “turtle.” Because of this, some interpretations of the aspidochelone depict it as a massive sea turtle with an island on the back of its shell. However, other illustrations depict the aspidochelone as a whale-like creature or even just a giant fish.

Aspidochelone From A French Manuscript

Wikimedia CommonsA French manuscript featuring an illustration of the aspidochelone, here shown as a giant fish.

But what does the aspidochelone do? Well, according to some legends, sailors initially discovered the aspidochelone when they mistook it for an island. They docked their ship and disembarked, then built a fire on the “island” to cook their food — which made the aspidochelone hot, and so it submerged itself in the water to cool off, drowning the sailors.

Other stories say the aspidochelone could emit a sweet-smelling odor from its mouth to attract other fish to it, then devour them. The aspidochelone even later appeared in medieval Christian texts, where it became an allegory of Satan, described as having a body the size of a mountain.

Over time, the aspidochelone became a symbol of the dangers of the open sea, where massive creatures could lurk unseen and kill without warning. In fact, stories of the aspidochelone appear in cultures from around the world under different names — the Jasconius in Ireland, the Imap Umassoursa in Greenland, and the Zaratan in the Middle East, to name a few.

In each version, the aspidochelone is a truly frightening creature that spells almost certain death for any sailors who venture too close.

The Wendigo

The Wendigo

Searchlight Pictures/YouTubeThe wendigo as it appears in the 2021 film Antlers.

The wendigo is truly one of the most infamous creatures in Native American folklore — and one of the scariest cryptids on this list. Said to be a former hunter who resorted to cannibalism, the wendigo is an insatiable evil spirit wandering the Earth. According to legends, it stands at nearly 15 feet tall, but its appearance is emaciated, as it is never able to satisfy its hunger.

Its bones push out from beneath its skin, and its skull is sometimes depicted as being similar to that of a deer’s. Some descriptions give the wendigo large, sharp claws and owl-like eyes, while others say that it smells of death, decay, and corruption.

Likewise, some variations of the story describe it as incredibly fast with an unparalleled endurance, while others claim that it only hobbles forward, as if it’s falling apart.

Wendigo Cryptid

Wikimedia CommonsThe wendigo, one of the most frightening cryptids on this list, has appeared in a variety of popular media in recent years, including the show Hannibal and the video game Until Dawn.

Perhaps the most unsettling aspect of the wendigo, however, is its ability to mimic human voices. Rather than relying on speed and strength to catch its prey, the wendigo prefers to slowly lure its victims into the wilderness, away from civilization. It can also turn its victim into a wendigo, which will continue to spread its malevolent hunger until the end of time.

During the turn of the 20th century, the Algonquian people attributed numerous disappearances to the wendigo, believing that many of the missing had been lured away by the horrifying creature. In fact, one rough translation of wendigo is “the evil spirit that devours mankind.”

If that doesn’t send a chill up your spine, what will?

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author
Austin Harvey
author
A staff writer for All That's Interesting since 2022, Austin Harvey has also had work published with Discover Magazine, Giddy, and Lucid, covering topics including history, and sociology. He has published more than 1,000 pieces, largely covering modern history and archaeology. He is a co-host of the History Uncovered podcast as well as a co-host and founder of the Conspiracy Realists podcast. He holds a Bachelor's degree from Point Park University. He is based in Pittsburgh, Pennsylvania.
editor
John Kuroski
editor
Based in Brooklyn, New York, John Kuroski is the editorial director of All That's Interesting. He graduated from New York University with a degree in history, earning a place in the Phi Alpha Theta honor society for history students. An editor at All That's Interesting since 2015, his areas of expertise include modern American history and the ancient Near East. In an editing career spanning 17 years, he previously served as managing editor of Elmore Magazine in New York City for seven years.
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Harvey, Austin. "A Definitive List Of History’s Creepiest Cryptids — And Where They Allegedly Live." AllThatsInteresting.com, April 21, 2026, https://allthatsinteresting.com/cryptids. Accessed April 22, 2026.