The Blue Mountains also has some of the best walks in Sydney
. A good place to start is the Information Centre
. From there, you can go on lots of walks, but the one that I highly recommend is the Wentworth Falls
walk. This will take you past an 80 metre waterfall, with views all the way to the horizon
The Blue mountains is also favoured by rock climbers; however, it is considered a bit dangerous, since the sandstone there is not always solid.