I don't know fur sure, but I'd guess that there are more things to see in Austin, TX, than bats. Not that there's anything wrong with bats, mind you. The problem we have here is the "one topic per city" limitation, of which Austin's has just been used up by Jim Hudson to advertise bats.
One city per topic would seem to be a more reasonable guideline in these new "What to See, and Where?" forums. One city per topic - as opposed to one topic per city - would also make a lot more sense for places like Los Angeles, where there are so many things to see and do that one topic could hardly do it justice. Also, jamming everything under one Los Angeles topic would force people looking for different types of things to slog through a whole topic packed with stuff that doesn't interest them, because everything in Los Angeles has to be covered by ONE TOPIC.
One the other hand, one topic per city would seem to work just fine for, say, Tuscarora, Nevada, where the probably isn't much to see except the outdated Velveeta over at the Pak & Pay.
EDIT: Okay, Tuscarora, NV is not served by Amtrak. But plug in Wolf Point, MT, or Helper, UT and the result is pretty similar.