Mystery?

Something that is difficult or impossible to understand or explain.

Paranormal mysteries

category: Earth mysteries

1.      Atlantis‎

2.      Atlanteans‎

3.      Atlantis in fiction‎

4.      Books about Atlantis‎

5.      Atmospheric ghost lights‎

6.      Bermuda Triangle‎

7.      Books about the Bermuda Triangle‎

8.      Films set in the Bermuda Triangle‎

9.      Hollow Earth theory‎

10.  Hollow Earth in fiction‎

11.  Ley lines‎

12.  Phantom islands‎

13.  Phantom Arctic islands‎

14.  Phantom islands of the Atlantic‎

15.  Atlantis‎

16.  Phantom sub Antarctic islands‎

category: Forteana

category: UFO sightings

fictional or artificial mysteries

Category: Mystery fiction

Category: Riddles

unsolved problems

category: Open problems

category: Out-of-place artefacts

category: Unexplained disappearances

category: Unsolved deaths

category: Undeciphered writing systems

problems with known solutions

category: Physical paradoxes

category: Misconceptions

category: Secret places