Bajo las aguas de Yonaguni, Japón, yace una enigmática formación de piedra que desafía la historia oficial. ¿Antigua civilización sumergida o capricho de la naturaleza? Sus ángulos rectos, escaleras y terrazas talladas sugieren una posible construcción humana. Los secretos milenarios aún esperan ser revelados. 📺 Todo esto y más en tu pantalla de History #AlienígenasAncestrales | HISTORY

134K views · 4.1K reactions | The Yonaguni Monument is one of the many mysteries of the deep that the #AncientAliens experts explore during tonight's all-new episode, starting at 9/8c on The HISTORY Channel. | Ancient Aliens | Facebook

It's the size of five football pitches and towers like an eight-story building—yet it sits silently beneath the sea. Discovered off Japan's Yonaguni coast in 1986, this massive underwater structure still sparks wonder today. Is this a lost monument of ancient civilization or a natural formation? 🗿 #DrainTheOceans is now streaming on Disney and Hulu. | National Geographic History

The Yonaguni monument is impossible to investigate fully by diving. With the the help of survey technology, we can drain away the water to show the exact details of this mysterious structure. | National Geographic TV