Walk Highway 200 (Maan Road) and stop at the foot of Monaroya volcano, a dead wasteland left by the 1984 eruption. The saddle-shaped Route 20 runs through the Big Island of Hawaii and is connected to Route 190. Along the highway are the two high-altitude volcanoes of the Big Island, Monaqueya and Monaroya, with a flat elevation of more than 2 km. It is precisely because these two mountains block the warm Pacific clouds passing through the islands that make the eastern and western parts of the island very different. The impact on Ma'an Road is fatal, because the clouds are at an altitude of 2 km on the road, the road is cloudy and dangerous, fortunately the brand new asphalt road has reduced some psychological shadows, but if you are not familiar with the road conditions, it is still exempt.