I know what you mean about these structures taking on an entirely new aspect, it’s like the landscape’s claimed/reclaimed it for its own purposes after man’s discarded it. Very Dying Earth indeed! ‘Postcards from Zothique / ‘Holiday Snaps Under a Red Sun’

Would be interesting if people did design sculptures and other structures to decay in a predetermined way, for instance using materials that erode at different speeds so you might start with a statue of a person, then a skeleton, then nothing…