Blue Cave, Marine cave at Maeda Cape in Onna, Japan.
Description
Blue Cave is a natural marine cave at Maeda Cape in Onna with openings that allow sunlight to enter and illuminate the water. The interior space is large enough for snorkeling and diving, featuring clear water and a rock ceiling overhead.
History
The cave was originally a shelter for traditional boats during rough seas and was locally known as Kumayaa-gama. Over time, it was transformed into a popular snorkeling and diving destination for tourists.
Culture
The cave is a place where visitors experience the underwater world of Okinawa firsthand. You encounter various fish species and gain a sense of how central the sea has always been to local life.
Practical
You can visit the cave only through a guided snorkeling or diving tour, best done in the morning when light is best. Bring basic swimming gear or rent it on-site, and pay attention to tidal times for a safe experience.
Did you know?
The cave acts as a natural reflector because sunlight enters through multiple openings and refracts in the water. This happens only at certain light angles, making the blue coloration vary in intensity at different times of day.
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