長い年月をかけ、波や風雨の侵食によってできた海食洞。関東大震災により隆起して陸の洞門となったとか。城ヶ島灯台から城ヶ島公園にわたりハイキングルートがあり散策できる。途中にある展望台から眺める景色は迫力満点。
A marine cave formed over a long period of time due to the erosion of waves, wind, and rain. It seems that it rose up due to the Great Kanto Earthquake and became a land cave. There is a hiking route from Jogashima Lighthouse to Jogashima Park where you can take a walk. The view from the observatory on the way is impressive.
