The famous scenic spot of Blue Mountain in Sydney is to see the Three Sisters Peak. We take a yellow cable car from the scenic world and walk down the hiking route for about 20 minutes until we reach the echo angle. We take pictures and then go down the side path to one of the three Sisters Peak's peaks, which is connected by an iron bridge. The iron escalator was steep when we went down. We could only see a little when we crossed the iron bridge. The other two couldn't cross it. But standing in the peak and looking at the scenery in the mountain was incomparable. The blue sky and white clouds set off the green hills and were relaxed and happy.