The Houston Zoo is a great zoo with a huge variety...

The Houston Zoo is a great zoo with a huge variety of animals and displays. I've been here a handful of times since moving to the Houston area and it's never a disappointment. There are a few exhibits along the way that are indoor and air conditioned, and they also have a good supply of water fountains - so bring your own bottles for water. Also, you can bring in wagons and your own food so you aren't forced to spend money on food. My only complaint is that if you don't get there when they open, the parking can be a real nightmare.