Category:Mysteries

Use one of the following categories:

Paranormal mysteries

(etc.)
 * category:Earth mysteries
 * category:Forteana
 * category:UFO sightings

fictional or artificial mysteries
 * Category:Mystery fiction
 * Category:Riddles

unsolved problems
 * category:Open problems
 * category:Out-of-place artifacts
 * category:Unexplained disappearances
 * category:Unsolved deaths
 * category:Undeciphered writing systems
 * category:Unexplained phenomena

problems with known solutions (etc.)
 * category:Physical paradoxes
 * category:Misconceptions
 * category:Secret places