Uluru
It is one big rock. The sheer size of it is amazing and photo's are either 10km away and you can't get the scale, or close and you just have an ochre background.
I was conflicted about the climb but decided to do it since we had the opportunity. And then I was just terrified for the initial and final chain section. But there was no rubbish, no broken glass, no graffiti, just lots of proud and happy people helping other proud and happy people. We are both glad we did it.
As a kid, it took me 3 goes to try get to the top. I was so scared about that final part with no chain. I've never liked heights since