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I just recently remembered a book or short-story I read in the mid-80's (as a middle school student, I think) that was a scifi/fantasy about tourists who were able to travel to a foreign planet. Specifically I recall there being some warning about not touching anything and making sure to stay on the elevated walkway/path. Of course, someone doesn't and there are huge consequences (I think it might have had strong environmentalist/butterfly effect overtones). It was a bit of a morality tale as well if I remember correctly.
Any help in identifying it would be awesome! Thanks.