It's the distinctness and uniqueness of those examples, as well as that they're surrounded by trees/nature, that make them so beautiful. Brutalism as intentional art, not as an unintended byproduct of cost-saving or simply not caring.

The depressing nature of a lot of brutalist architecture (especially that created by governments) is the uniformity, homogeneity and the mass-produced faux-utilitarian feeling it evokes, as if the inhabitants are all interchangeable peons with no individual spirit. It's a reminder of the depressing local conditions that lead to that architecture coming into being in the first place.

https://www.theguardian.com/housing-network/2016/jan/13/brut...