I will be returning to Australia for a third visit in December and spending a full week in Sydney between Christmas and New Year's (I'm so excited!!). I'm thinking about spending one of the days in the Blue Mountains once again. Given that my prior visits were to the Katoomba and Leura area, I'm looking at Wentworth Falls or Blackheath this time. Is one area more scenic than the other? I'm interested in taking the train from Sydney and then doing a 3-5 hour bushwalk / hike to explore a different area of the mountains. Any suggestion among the trails that involve the Grand Canyon, National Pass, or Govett's Leap? Thanks.