Wombeyan Caves
The drive from Mittagong to Wombeyan caves is scenic, but also rather windy (a sign at the caves says "not suitable for semi-trailers", but any kind of caravan or truck would have problems). We saw two wedge-tailed eagles soaring overhead on the way.
The caves are in a sheltered valley around the (dry) Wombeyan Creek. We arrived at around 5pm, only to find no key in our cabin door (as promised) and no one in the visitors' centre... so we had to get the neighbour to ring them up. The guy who came out to clean up the cabin for us ended up being our guide the following day - there are only a handful of people working in the valley.
The following morning we walked up to the one chamber Tinted Cave (open access), looked into Mares Forest Creek and did the self-guided walk through Fig Tree cave. After eating lunch in very slight drizzle, we walked up via the Arch track to the start of the Wollondilly Cave tour, which was followed pretty much immediately by the Junction Cave tour. It was very quiet, it being a weekday in winter, and there were only ten people on the first tour and six on the second.
The caves were lovely, though they all blur together in memory. It was the driest in the memory of anyone there - some forty years! - so the formations were not as spectacular as they are when there's water on them.