This morning, head out on a day trip to the UNESCO World Heritage-listed Blue Mountains – a land of rugged peaks, waterfalls and dense eucalyptus forest. Stop at Wentworth Falls for grand valley views at Fletchers Lookout. Head to Katoomba and visit Echo Point Lookout, which overlooks the iconic Three Sisters. Walk the Three Sisters track for views of the national park below. You might like to stop for lunch at the famous Lookout Restaurant for the views overlooking Echo Point Escarpment. Or maybe head into Katoomba town to check out the shops. This afternoon, you’ll head to Scenic World – a private, family-owned tourism spot backdropped by the mountains. Hop aboard the steepest railway in the world and ride into Jamison Valley, where you can explore the many boardwalks through the rainforest, looking out for lyrebirds and ancient tree ferns. Ride the cableway, which cruises past the sandstone escarpment and Orphan Rock. See Katoomba Falls and the Three Sisters again, but from above, on the Scenic Skyway, which soars through the mountains. Tonight, return to your accommodation in Darling Harbour. (B)