I've lived in the Houston area a LONG time now. And I'm embarrassed to say that I'd never gone to see the Waugh Drive bat colony. Until this past Saturday, that is!
What - you've never been either?! Head on down a bit before sunset. Peer under the bridge at the bats as they stir (you may need to hold your nose and wear a hat...). Soon enough they will start to fly out. There's a lot of them so it takes a while. And, if you are lucky, you'll see some hawks out for an evening snack of fresh bat!
After the sun goes down, take a selfie at the "dandelion" fountain, gaze at the moon, then head to the Chocolate Bar for ice cream.