Image Source: Wikipedia Commons
Yonaguni Monument. Say what? It's a submerged rock formation off the Ryukyu islands in Japan.
This sandstone and mudstone structure is around 490 feet long, 130 feet wide, and 90 feet tall. It starts about 16 feet below the surface so it can be easily visited by divers, but the currents in the area are strong. The regular shapes, including flat edges and 90 degree angles, make it look manmade, but there are no records of anything like this being built in the area. Scientist Maasaki Kimura theorizes the thousand-plus-year-old structure could be the lost continent of Mu.
Want a closer look at the monument or to see the cute ponies that inhabit the island? Check out this five-minute YouTube video.
Image Source: Liangtai Lin's image of a model of the Yanaguni Monument
Ever heard of the Yonaguni Monument? Ever been snorkeling or scuba diving?
I'm doing another Japanese Y word over at the Parallels blog today: Yūrei, or Japanese ghosts.