Third-Party
This may be of interest for any visitors you have coming to town. It includes a guided tour of Jenolan Caves. It's a Gray Line tour and says its 64% off.
"The Deal
For just $59 per person, take a day trip from Sydney to visit the magnificent Blue Mountains and Jenolan Caves. Regularly priced at $162, this package from Gray Line includes return transportation from the Sydney CBD and a number of exciting bonus stops.
The day begins with a look at Sydney's Darling Harbour. The coach will then continue on to the Blue Mountains, taking in the charming mountain village of Leura en route.
Guests will stop for a photo opportunity with the famous Three Sisters rock formation, and have the option of riding the world's steepest Scenic Railway, Cableway or Skyway (at additional cost).
In the afternoon, take a guided tour of Jenolan Caves, Australia's most famous underground limestone cave network. Visitors will also have the chance to tour the Lucas, Chifley or Imperial Caves.
The tour departs Sydney on Mondays, Tuesdays, Thursdays and Saturdays at 8am, and returns to the CBD at around 7pm.
The Fine Print
Vouchers can be redeemed starting Saturday 18 February until 4 June, 2012. Valid for 1-day trips departing Sydney at 8am Monday, Tuesday, Thursday or Saturday. Hotel pickups are available throughout the CBD. Book by: 4 May."
"Regularly priced at $162, this package from Gray Line includes return transportation from the Sydney CBD and a number of exciting bonus stops."
I read that and it made me think that the "exciting bonus stops" are all the public bus stations for picking people up on the way there and back ;-)