A UNESCO World History Site, beautiful Blue Mountains National Park lies 81 km west of Sydney and is a popular day trip from the city. Named for the blue haze coming from the many eucalyptus trees, this stunning park protects more than 664,000 (areas of land about 200 feet X 220 feet) of bushland and includes dramatic deep cracks in the Earth, waterfalls, (existing from the beginning) rock paintings, and 140 km of hiking trails. The most famous attractions in the park are the (huge/very tall) sandstone (groups of rocks) called the Three Sisters. Other highlights include the Katoomba (beautiful to look at) Railway, the world’s steepest, which whisks passengers down the Jamison Valley through a cliff side tunnel into a very old rainforest. Hiking, (lowering down a wall with a rope), rock climbing, mountain biking, and horseback riding are all popular things to do in the park.