Shimizu Keiryu Hiroba Park

Keiryu Hiroba Park locates in the city of Kimitsu on Chiba prefecture’s Boso Peninsula. In the park, you can find Kameiwa Cave, which is famous for its heart-shaped reflection. The cave was made in the 1600s as a tunnel to help irrigate nearby rice fields. The heart-shaped reflection can be seen in the early morning hours, just a few days before the spring and autumn equinoxes. The weather also must be clear and sunny, and humidity is an important factor as well.