It's worth spending a few hours at Okinawa World to get a quick overview of local culture. There are tropical fruit orchards and workshops for textile weaving, glassblowing, pottery, dying, and printing. Traditional Eisa dance performances take place several times a day. The main attraction is Gyokusendo Cave, the second-longest limestone cave in Japan. You can walk through an 890-meter cavern and marvel at the giant stalactites and stalagmites. From Naha Bus Terminal, take Bus 54 or 83 and get off at Gyokusendo-mae.