The Mysterious Underwater Wall of Nhon Hai

Historical Bình Định, Vietnam

About The Mysterious Underwater Wall of Nhon Hai

Features an unusual stone formation hidden beneath the sea off Nhon Hai that emerges only during the lowest tidal retreats, resembling a submerged ancient wall stretching toward Hon Kho Island. Comprises parts that are unusually broad and flat, with a notable section near Hai Giang extending for around three kilometers. Shrouded in mystery regarding its origins, sparking ongoing debate between theories of ancient human construction (such as a coastal defense) and natural geological formation, with no historical records yet confirming its exact purpose or age. Creates one of the most unique, otherworldly landscapes around Quy Nhon when it briefly rises from the receding sea for a few days each month.

Getting there

Easily reached by traveling from central Quy Nhon to the Nhon Hai coastal community, where local boat operators and guides can help you access the viewing spots. Best visited during low-tide periods that occur only a few days each month; check local tidal charts or consult local residents in advance to catch the exact window when the submerged wall becomes visible. Ideal for photography and exploration, though you should wear secure footwear and exercise caution if walking near the slippery rock formations as the tide begins to shift. Plan your visit between early March and mid September for the calmest sea conditions, clearest water visibility, and most favorable weather for observing this coastal phenomenon.