I have 5.5 hours between flights, so that likely means I have about 4 hours to work with, more or less. (Flying YVR-IAH-PBC (Puebla)).

I've previously had an 11-hour layover at IAH, and took a cab to a shopping mall, which worked out fine, but I want to do something different this time.

I am thinking that maybe I'll go hang around an airport hotel and take a walk, particularly a hotel that has nice grounds. Is there such a place near IAH?

Any other ideas for doing something other than wandering the airport? I don't want to rent a car.