Koya-Ryujin Skyline is the route connecting between Koyasan and Ryujin Onsen in Tanabe city. It runs for 42.7 Km through the Kii Mountains range going south from Koyasan toward Rujin. It is one of the best stunning autumnal leaves viewing spots in Wakayama prefecture. You can enjoy the breathtaking panoramic view of the Kii Mountain range from the observatory at Gomadanzan (1372m), the highest point of the Kii mountain range. Don’t miss it!!!