Big Cornish holes...

Here is more Cornish handiwork. This is a view of the Burra mine, also a copper mine, a deposit discovered in the early 1840s, like Kapunda. This hole was mined a lot longer, and a lot more copper was extracted. The holes is very deep, at least 50m under water level.

Here is a better view of the holes. Ain’t that special. The museum is the buildings at the rear of the lake.
I am not as interested in the mine as the reclamation at the edges. These pines...
I don’t know the species, and have no means at the moment of finding out. I will give some indicators, like cones, needles etc.
Sapling, new fruit, new needles.
Cones:
Big lot of trees man, all over the place. This is disturbed ground, these are weeds, unless they are deliberately planted, in that case they are weeds with a purpose.
For more on Burra try here.