Getting There
You can drive and take your time and stop at Katoomba, and enjoy the small town filled with cafes and art galleries and not take a 30-60min bush walk to enjoy the scenery and take some photos of the most colorful birds and scenery. You might be lucky to spot the elusive black panther that is an urban legend in the mountains.
The last part of the journey is a windy 10km down the mountain with the wheels just a foot away from the edge. Make sure you keep your eyes on the road.
As you get to the bottom you come through a opening and when you drive through, on the other side looks like a movie set with a Victorian era hotel. That's the only accommodation around if you want to spend the weekend. Make sure you book before. The car park is pass the hotel, so you can walk around.
There are a few caves which have guided tours, some taking 45min minutes for easy access, while some are more challenging and requiring you to be fit to participate. You also get one free pass to do a unguided tour when you purchase a guided tour. Make sure you bring a jumper/jacket, even on a warm day, it's nice and cold inside the cave. So if you're in Sydney and want to explore some of the NSW best hidden natural wonder, you wont be disappointed.
Inside the Imperial Diamond Cave
Blue Lake (nice bush walking track)