The Blue Mountains are only 100 kilometers from Sydney and can be easily reached by car. The Blue Mountains are a narrow mountain range, and most of the area is classified as a Blue Mountain World Heritage Site. Its name is very intuitive. The gas emanating from the eucalyptus trees in the mountains and the sun shrouds the entire mountain in a light blue smoke. The hike route in Blue Mountains is not difficult, so it is also a weekend for Sydney people to choose from. A few days after I arrived in Sydney, I was already a little tired of the city. I came to the Blue Mountains and immediately plunged into the embrace of nature, breathing the blue air of the blue mountains.