Altho the subject matter may be sobering, the writing is so beautiful that I love it, from The Invisible Pyramid:
“Beginning on some winter night the snow will fall steadily for a thousand years and hush in its falling the spore cities whose seed has flown. The delicate traceries of the frost will slowly dim the glass in observatories and all will be as it had been before the virus wakened. The long trail of Halley’s comet, once more returning will pass like a ghostly matchflame over the unwatched grave of the cities. This has always been their end, whether in the snow or in the sand.”
NANMYKEL.COM 
Ray Bradbury, my favourite sci-fi writer talked as well about how nature somehow will take back the cities one day. It very well may come to pass. I forget the name of the story and don’t have the book any longer so can’t look it up.
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My beautiful bookstore/coffeehouse in Laguna Beach was named after Ray. He loved us because we promoted freedom of expression.
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