Tucked away on Mount Hachimantai in northeastern Japan is a lake called Kagami Numa. Most of the time it’s pretty ordinary looking, but if you go there at the right time you might be lucky to get a glimpse of a phenomenon which transforms the lake into what looks like a giant eye. Local legend has it that it’s caused by some lovelorn dragons in the area. BBC World of Wonder

Video taken by Hiromi Tanoue

https://www.bbc.com/reel/video/p08mp8sc/japan-s-mysterious-dragon-eye-lake