Ferry from land to Haikou City! The air suddenly became so fresh! The crater park is also the commanding height of Haikou! As for watching the sea, it will be a matter of a few days! In general, the altitude is not very high, you can walk slowly around the crater, and the rainforest ecosystem at the bottom of the valley is maintained very well! It is also good to popularize science! Driving is more convenient! Online ticket purchase needs to be [scenery] [interesting] [cost-effective]