Second to the Avatar mountains this is the other “must” see on your visit. We took the cable car from the city to the top of the mountain (7.5 km long!!) which gives you beautiful views of the mountain. On the top it was cloudy so we walk around the full top of the mountain and on the western side it opened up so you could enjoy the view and the massive drop below your feet. Do take the glass walkway if you are not scared of heights. It is impressive. The actual cave (or rather hole) is amazing. I suggest first going to the bottom of the 999 steps and the walking up - you really feel the awe of the place.