The Yonaguni Monument, an enigmatic underwater structure near Japan’s Yonaguni Island, has intrigued scientists and explorers for nearly four decades. Discovered in 1986, this submerged ...

Believed to be over 10,000 years old, it challenges the timeline of human construction, suggesting that advanced societies may have existed long before previously thought.

A 30-metre “pyramid” submerged just off the coast of Japan is turning heads — and could shake up everything we thought we knew about ancient civilisations.