Yonaguni Monument

What the Show Claims

• ›An underwater stone structure off Yonaguni Island appears to be a man-made pyramid and terrace complex
• ›Steps, terraces, and arches suggest an alien-built city now submerged beneath the Pacific
• ›If man-made, the structure dates to 8000–10000 BC — before any known civilization
• ›Represents the remnants of the lost continent of Mu or Lemuria

What Archaeology Says

The Yonaguni Monument is a submerged rock formation discovered in 1986. Geologists are divided on whether it is man-made or natural. Masaaki Kimura (University of the Ryukyus) argues for artificial construction; most mainstream geologists attribute the terraced formations to natural fracturing of the local mudstone and sandstone along regular joint planes — a well-documented geological phenomenon in the area. No datable artifacts have been found in association with the structure.