This is Cradle Mountain in Tasmania. Staying with an outdoors-y sort of a person, as I did in 2000, means being taken on trips I wouldn't have imagined for myself - in this case, not only a long walk around the lake from left to right and across the open ground beyond, but also up to the top of the right-hand peak.
It's not as alarming as it looks - at the back of the peak, the way up is clearly marked - not so much a path as a route for scrambling over the boulders, but none the less, no special equipment required beyond boots with a good grip, and some sense of balance.
Even for someone with no great head for heights, like me, it felt perfectly safe - though with one final moment where the route narrows between two very steep declines to either side.
From the top, the views are spectacular:
Time, before starting the clamber down (somehow harder than the climb up), to look back at where we came from.
And for a touch of cute (and a rare occasion where the wildlife comes out to present itself for photos in the daylight), here's a visitor that stopped to investigate our rucksacks in the hut where we rested our (by now, jelly) legs on the way back. If memory serves, it's a spotted quoll: