Katashina Village, Gunma Prefecture
Rating
Cost per person
¥500
Ryugu Karst, located in Katashina Village, Gunma Prefecture, is a fascinating natural phenomenon near Oze National Park. This area features unique pond formations where water mysteriously flows in and out of interconnected subterranean tunnels, creating the illusion of disappearing and reappearing water sources. Known as the Ryugu phenomenon, it's believed these waters connect to an underwater palace, hence the name. The best time to visit is during a hike through Oze National Park, where you can observe this geological wonder from well-maintained wooden paths. Look for marked plates on the paths to understand the water flow dynamics. It's a great spot to appreciate the unique wetland ecosystem.