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4 votes
2 answers
1k views

The Fenn Treasure Hunt (REAL!)

I heard of this riddle and wanted to pass it on to see if you expert puzzlers could solve it! These are clues for real treasure hidden somewhere in the Rocky Mountains. As I have gone alone in there ...
Crozier's user avatar
  • 2,803
6 votes
1 answer
501 views

Late 18th/early 19th century numbers grid

I was researching an historical figure on the Isle of Man, Capt George Quayle (b.1751 - d.1835), and in amongst the museum's papers was this numbers grid which was part of his effects. The museum ...
Breebeg's user avatar
  • 61
6 votes
0 answers
866 views

Need help with a cipher: "poems" with capital letters

I am trying to figure out a cipher I think I found in a book from 1982 and it's a 36 year old mystery we are trying to solve (I will reveal the book if this turns out to be something so everyone can ...
Stephanie's user avatar
21 votes
1 answer
3k views

Ricky McCormick's Notes

On June 30 1999, Ricky McCormick was found dead in an isolated area, 15 miles away from his home. He didn't own a car, and the area was not subjected to public transport so it is a mystery how he got ...
Beastly Gerbil's user avatar
26 votes
3 answers
2k views

This image contains a "Great Discovery"

The Puzzle: Source material taken from here As discussed on Numberphile, here is John Herschel's doodle, sent to his friend Charles Babbage. John H. John Herschel was an English polymath, ...
Ovi's user avatar
  • 403
55 votes
1 answer
6k views

Unsolved Mysteries: D'Agapeyeff cipher

The D'Agapeyeff cipher is an as-yet unbroken cipher that appears in the first edition of "Codes and Ciphers", an elementary book on cryptography published by the cryptographer Alexander D'Agapeyeff in ...
pacosta's user avatar
  • 691
78 votes
1 answer
20k views

Unsolved Mysteries: Kryptos

This is the second in a series of Unsolved Mysteries posts. These posts explore current unsolved real-world puzzles. Since these have been unsolved for years, it's uncertain whether anyone on on ...
GentlePurpleRain's user avatar
42 votes
1 answer
12k views

The Beale Papers

The background to this one's given here. NB: These may not be a genuine cryptograms (current thinking is that these are gibberish); but I though it interesting to share these in case they're genuine/...
JohnLBevan's user avatar
  • 1,305
36 votes
3 answers
4k views

Unsolved Mysteries: Magic Square of Squares

This is the first in what will hopefully be a series of Unsolved Mysteries posts. Note that this puzzle has no known solution, nor any proof that a solution is impossible. We will see how ...
GentlePurpleRain's user avatar
83 votes
2 answers
4k views

A good puzzle is a double-edged sword

A rare double-edged sword is currently on loan from the British Museum to the Magna Carta exhibition. The sword itself is described as likely made in Germany around 1250-1330 and includes the ...
Richard's user avatar
  • 5,350