The Blue Mountains are a great place to visit to see and experience some of Australia’s best scenery and wild life. They are an easy day trip from Sydney. I think that the best options for getting there are on the train (keep an eye out for Stray’s backpacker day trip) or with your own vehicle (spaceship rental) if you want to do extra exploring. If you get the train be careful to get on the express so it’s only 90 minutes to Katoomba from Sydney’s central station. If you drive I recommend an alternative route on the way out (to the traditional Parramatta rd). The historic ‘bells line of road’ (high way 40) which follows an old aboriginal walking track to the north of the traditional western highway and gives you access to some stunning bush country – as well as different out and back routes (come back on the great western highway and Parramatta road). The drive takes about 90 minutes.
The attractions are vast. The Blue Mountains aren’t mountains at all but a raised plateau – a national park covered in native bush (gum trees) which is where they get their blue hue. There are many look outs and ways to take in the views. Try the scenic railway or skyway from scenic world, do a walk such as the ones from Katoomba cascades or echo point – from where you can see the famous ‘three sisters’ rock formation. If you have travelled up on the train I find the ‘explorer bus’ the best way to access all of the attractions. If you have your own vehicle (spaceships rentals) seriously consider staying longer at one of the national parks campsites. There is also an outstanding youth hostel YHA in Katoomba.
There are kangaroos and koalas everywhere so keep and eye out for them.
Consider travelling further to the excellent Jenolan caves or to Mudgee for a wine tasting (about two hours further drive).