Visit the Gangala Valley, historical cave and forest in the root of Okinawa. Amazing archeological discoveries await you: stalactites (Ufushu Gajumaru), that grow under a natural rock, limestone cave, natural cave cafe, and the nature tour! The tour is highly recommended even if they charge 2000 yen, requires pre-booking and is conducted in Japanese. You are still given a choice of hearing English recording or holding a hard-copy guide. You can experience a Japanese Omotenashi as the tour provides you a tea bottle, bug spray and a very informative as well as caring tour guides.