Well, I am certainly as far from techno-phobia as it might be possible, but oil rigs are examples of machinery which are connected to large damages to the environment. Not so much the machines themselves, but the oil they have been pumping. See also those - by themselves - magnificient excavators to dig for lignite. Great machinery, but if you consider the outcome, it is very dystropian.

Nevertheless, they are engineering marvels and as such quite a view to behold.