New Zealand Mt. John Observatory

Mt. John Observatory is situated at 1,029 metres atop Mount John at the northern end of the Mackenzie Basin in the South Island.
Mount John rises quite steeply as a single mountain right next to the town of Lake Tekapo with the famous Church of the Good Shepherd on the shores of Lake Tekapo. On its summit it's the leading New Zealand observatory, and a large area around Mt John is a light sanctuary.
It overlooks the (bigger) Lake Tekapo in turquoise and the (smaller) Lake Alexandrina.

Up to the observatory (and back) leads a narrow road in serpentines. The return journey in particular can be exhausting.