青の洞窟, Sea cave in Maeda, Okinawa Prefecture, Japan.
The Blue Cave is a sea cave in Okinawa spanning roughly 24 meters in length with water depths ranging from 10 to 12 meters, formed by natural limestone formations. A white sand floor beneath the clear water creates the distinctive blue illumination that fills the entire chamber.
An Austrian baron first documented the cave in the 1860s, though it remained accessible only by diving for many decades. In 1884, workers created an artificial entrance that fundamentally changed how people could visit this place.
The cave takes its name from the striking blue color that dominates its interior, a visual phenomenon that has captivated visitors and locals for generations. Today, people come to witness this natural display and experience how light transforms water into something almost unreal.
Access is through organized boat tours that provide all necessary equipment and typically last one to two hours. Early morning sessions offer the best light conditions and fewer crowds for a clearer viewing experience.
Light enters through a small natural opening and bounces off the white sand floor, creating an intense blue glow that appears almost fluorescent. This optical effect varies with the sun's position and time of day, making the color more or less vivid depending on when you visit.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
