Okinawa World was a pleasant surprise, with Gyokusendo Cave being the main highlight of the visit. The cave is huge and really impressive, with beautiful stalactites and stalagmites throughout the walking route. The underground scenery feels quite different from the usual Okinawa attractions, and the cool temperature inside the cave was a nice break from the heat outside.The cave is well maintained, with a proper walking path and lighting that makes it easy to appreciate the different formations. There are also some beautiful sections with underground water and colourful lighting. The walk itself takes around 30–45 minutes depending on your pace and how many photos you take, but I would recommend allowing more time to explore the rest of Okinawa World.For the entrance fee, I think it offers good value for money, especially because the ticket gives you more than just access to the cave.