Some of history’s greatest mysteries were never solved—they were simply left behind.
Questions like what happened to the Lost Colony of Roanoke, who wrote the Voynich Manuscript, and the identity of the Somerton Man continue to puzzle researchers even today.
Some mysteries are tied to ancient knowledge, like the Antikythera Mechanism, often called the world’s first computer, or the Phaistos Disc, a code no one has been able to fully decode.
Others are connected to powerful figures and forgotten truths, from the missing tomb of Alexander the Great to the woman who may have filmed JFK and the true age of the Sphinx.
Each mystery offers clues—but never enough to fully explain what really happened.
Explore the full collection of historical mysteries below.
High above the Peruvian desert, giant figures and endless lines still raise the same question they did a century ago: who made them, and what were they trying to say? The Nazca Lines remain one of history's most haunting unsolved puzzles.
Imagine a book, centuries old, its pages filled with a flowing script no one can read and illustrations of plants that don't exist. This is the Voynich Manuscript, a mysterious codex rediscovered in 1912 that has baffled cryptographers, linguists, and historians for over a century. Carbon-dated to the early 15th century, its 240 vellum pages feature sections on botany, astronomy, and biology, all rendered with bizarre, fantastical drawings and an undeciphered language. Despite countless attempts by the brightest minds, from World War codebreakers to modern computer analysts, the manuscript's secrets remain locked away, an enduring enigma that challenges our understanding of lost knowledge and the limits of human decipherment.
Pulled from an ancient shipwreck as a corroded lump of bronze, the Antikythera Mechanism turned out to be a machine so advanced it seemed to belong to another age. Its gears, inscriptions, and eclipse cycles still unsettle historians because they hint at knowledge history may have lost.
When John White returned to Roanoke after three years, the colony was gone and only one carved word remained. The Lost Colony mystery still haunts American history because the strongest clue never became a final answer.
A well-dressed man was found dead on Somerton Beach with no ID, a hidden scrap reading Tamám Shud, and a trail of clues that only made the case stranger. Even after modern DNA appeared to give him a name, the real mystery never fully let go.
Gloria Ramirez arrived at a California ER already dying of cancer, but what happened around her turned an ordinary medical crisis into one of the most unsettling unexplained cases in hospital history. The Toxic Lady mystery still sits in the gap between witness testimony, chemistry, and unease.
After two sisters were killed in Hexham, their parents later had twin girls who seemed to know too much about the dead children they never met. The Pollock Twins case still sits in the uneasy space between grief, memory, and something far stranger.
Two children appeared near a wolf pit in medieval Woolpit with green skin, an unknown language, and a story no one could explain. More than 800 years later, historians still argue over whether the mystery began with folklore, trauma, or two lost children turned into legend.
June and Jennifer Gibbons built a private world so sealed that almost nobody could reach them. The Silent Twins case still haunts because their bond ended with one sister dead and the mystery feeling more tragic than solved.