Internet Rabbit Holes: 30 Unsolved Mysteries to Read (2026)

Updated October 12, 2026

The best internet rabbit holes are unsolved mysteries with a paper trail you can read yourself: the Tamam Shud case, the Dyatlov Pass incident, the Mary Celeste and the Voynich manuscript. Add number stations, the SCP Foundation wiki and Wikipedia's list of unusual articles, and you have enough reading to lose a whole weekend.

Every link below comes from the Rabbit Hole wheel on Just Surprise Me. A quick note before you start: several of these cases involve real people who died. We kept the summaries factual and left out the gore. The mystery is the point, not the shock.

Unsolved (and half-solved) mysteries

The Tamam Shud case

In December 1948 a man was found dead on Somerton Park beach in Adelaide, Australia, with a scrap of paper reading "Tamám Shud" ("it is over") torn from a copy of the Rubaiyat of Omar Khayyam. The book later turned up with five lines of letters that nobody has convincingly decoded. In 2022, researchers announced a DNA-based identification, though police have not verified it.

Best for: people who like a mystery that is still moving

The Dyatlov Pass incident

In February 1959, nine experienced hikers died in the northern Ural Mountains after cutting their way out of their tent at night and fleeing into the cold. Russian prosecutors reopened the case in 2019 and pointed to an avalanche, and a 2021 study by Swiss researchers modeled how a small slab avalanche could explain the tent damage and injuries. Read the article and decide whether you think it's closed.

Best for: the classic deep dive

The Isdal Woman

In 1970, a woman was found dead in a valley near Bergen, Norway. Her luggage held wigs, coded notes and multiple fake identities, and the labels had been removed from her belongings. Isotope analysis of her teeth in 2017 suggested she was born around 1930 near Nuremberg, Germany. She has still not been identified.

Best for: spy-story lovers

The Lead Masks case

In 1966, two electronics technicians were found on a hill in Niterói, Brazil, wearing suits and lead eye masks, next to a notebook with cryptic instructions about capsules and waiting for a signal. The cause of death was never determined, and theories range from a drug overdose to UFO contact.

Best for: the truly baffling

The Hinterkaifeck murders

In 1922, six people were killed at the Hinterkaifeck farmstead in Bavaria, Germany. The killer was never identified. It's sad and serious, and the Wikipedia article handles it soberly.

Best for: true-crime readers who want history, not gore

The Mary Celeste

In December 1872 the Mary Celeste was found drifting in the Atlantic, still seaworthy, cargo intact, with the lifeboat missing and nobody aboard. The captain, his wife, their baby daughter and seven crew were never seen again. A young Arthur Conan Doyle later wrote a loosely based short story that helped make the ship famous.

Best for: your first ghost-ship story

The Flannan Isles Lighthouse

Three lighthouse keepers vanished from a remote Scottish island in December 1900. The official investigation blamed a huge wave. Bonus rabbit hole: the spooky logbook entries quoted all over the internet were later shown to be a fabrication.

Best for: people who like myth-busting

The Lost Colony of Roanoke

The original American mystery: an entire English colony that disappeared. Smithsonian's piece walks through what historians and archaeologists actually think happened.

Best for: history buffs

The SS Ourang Medan

A famous story about a ship found with its whole crew dead. The twist: researchers have never found proof the ship existed at all, and the article explains how the legend spread.

Best for: learning how internet legends are born

The Bermuda Triangle

The legendary patch of ocean where ships and planes supposedly vanish. History.com covers both the legend and the more boring explanations.

Best for: a light starter mystery

Codes, ciphers and strange signals

The Voynich manuscript

A handwritten book full of plants nobody has identified, star charts and an unknown script. The vellum has been carbon-dated to the early 1400s, and no proposed decipherment has been accepted. Yale's Beinecke Library has high-resolution scans, so you can try yourself.

Best for: puzzle people with patience

Number stations schedule

Shortwave stations that read out strings of numbers, widely believed to be used for messages to intelligence agents. Priyom tracks them and posts a live schedule.

Best for: radio nerds and spy fans

Station E06

An English-language number station Priyom attributes to a Russian operator. The page breaks down the message format: an ID, then groups of five-digit numbers, then a terminator.

Best for: hearing what a number station actually sounds like

Liber Primus

The unsolved runic book from the Cicada 3301 puzzles, one of the internet's most famous recruiting-or-maybe-not mysteries.

Best for: cryptography fans

List of unexplained sounds

Underwater recordings like the Bloop, Upsweep and Julia. Several now have likely explanations, like icequakes and icebergs, which somehow makes them cooler.

Best for: late-night listening

Fiction rabbit holes: the SCP Foundation

The SCP wiki is a collaborative fiction project written like classified files about anomalous objects. It is not real, which is exactly why you can enjoy it guilt-free.

SCP-173

The sculpture that moves when you blink. The entry that started the whole SCP Foundation.

Best for: your first SCP

SCP-087

A staircase that goes down forever, and something waiting in the dark.

Best for: people who like their horror slow

SCP-3008

An infinite IKEA you can't leave. The staff are not human.

Best for: anyone who has gotten lost in IKEA

There Is No Antimemetics Division

Stories about threats you forget the moment you stop looking at them. It reads like a connected story with a plot, not a stack of separate files.

Best for: readers who want a real story arc

Top rated SCPs

The community's highest-rated entries, ranked. A great map if you don't know where to start.

Best for: binge reading

Primary sources and deep reads

FBI Vault: UFO

Real declassified FBI files about unidentified flying objects, as scanned documents.

Best for: reading the source instead of the YouTube video

FBI Vault: Roswell

The FBI's records connected to the 1947 Roswell crash.

Best for: UFO fans who like receipts

Wikipedia: Unusual articles

Wikipedia's own curated list of its weirdest pages. Every entry is a new rabbit hole.

Best for: random clicking

Timeline of the far future

What science predicts will happen to Earth, the Sun and the universe over unimaginable timescales.

Best for: existential dread, the fun kind

List of common misconceptions

A long, sourced list of things most people believe that are wrong.

Best for: winning arguments

Wait But Why: The Fermi Paradox

If the universe is so big, where is everybody? A funny, stick-figure-illustrated tour of the possible answers.

Best for: space thinkers

Wait But Why: The AI Revolution

A long, readable essay on superintelligent AI and why it might be the last thing humans invent.

Best for: a big-picture read

The Really Big One

The New Yorker's famous piece on the earthquake risk facing the Pacific Northwest.

Best for: science journalism fans

Where to go when you finish a case

r/UnresolvedMysteries

Community write-ups and discussion of unsolved cases. The top posts of all time are a reading list in themselves.

Best for: comparing theories

r/AskHistorians

Strictly moderated, sourced answers about history. Ideal for checking whether a creepy story is actually true.

Best for: fact-checking a legend

How to rabbit-hole responsibly

• Start with the encyclopedia, then the forums. Wikipedia and archives first, theories second.
• Watch for legends dressed as facts. The Ourang Medan and the Flannan Isles logbook show how fast a good story outruns the evidence.
• Remember the people. Many of these cases involve real families. Read with respect.
• Set a stop time. Seriously. It's 3 a.m. somewhere for a reason.

If you want something lighter afterwards, try our guide to the Library of Babel, our list of weird websites to visit when bored, or the cozy reset in relaxing websites for a fried brain.

Can't decide? Spin the Rabbit Hole wheel and let it pick tonight's mystery for you.