Beneath the waves of the East China Sea – at the South Westernmost of Japan’s Islands, lies a massive stone structure that some say is the remnant of an ancient, advanced civilization. Others say it’s nothing more than a geological formation.
So—was it built, or was it sculpted by nature?
We’re gonna dive into the mystery of Japan’s Atlantis: the YoNaGoonie Monument and decide for ourselves today.










References:
Info
Yonaguni Underwater Step pyramid or monument – CrystalInks. (n.d.). https://www.crystalinks.com/yonaguni_ruins
YONAGUNI PYRAMID STRUCTURE. (n.d.). PROVE THE BIBLE. http://www.provethebible.com/blog/yonaguni-pyramid-structure
Wikipedia contributors. (2025, January 11). Yonaguni Monument. Wikipedia. https://en.wikipedia.org/wiki/Yonaguni_Monument
The Editors of Encyclopaedia Britannica. (2017, September 11). Yonaguni Monument | Definition, Theories, & Facts. Encyclopedia Britannica. https://www.britannica.com/topic/Yonaguni-Monument
Wikipedia contributors. (2025b, February 19). Sphinx water erosion hypothesis. Wikipedia. https://en.wikipedia.org/wiki/Sphinx_water_erosion_hypothesis
Photos
Hachiya, S. (2018, August 22). Tojinbo, Fukui, one of the three rare cliffs in the world. Magical Trip Media. https://www.magical-trip.com/media/tojinbo-fukui-rare-cliffs-world/
File:Yonaguni Monument Arch.jpg – Travel guide at Wikivoyage. (n.d.). https://en.wikivoyage.org/wiki/File:Yonaguni_Monument_Arch.jpg
File:Yonaguni Monument Twin Megaliths up close.jpg – Wikimedia Commons. (2019, June 25). https://commons.wikimedia.org/wiki/File:Yonaguni_Monument_Twin_Megaliths_up_Close.jpg
Dickson-Smith, D. (2021, December 11). The Yonaguni ruins… an underwater mystery. Diveplanit – Dive Travel Agency. https://www.diveplanit.com/japan/okinawa/yonaguni-monument/