I know Houston has a transit system, but as far as I could tell it is mostly for getting people into Downtown that work there. They do not have much of a system that is integrated into neighborhoods or of many tourist sights that I know of, unless they have changed. I lived briefly in San Antonio Years ago while my Husband attended the Medical Branch of the Army for his studies. And I know they have a much better transit system. I myself am planning a trip the first of the year to visit my mom in that general vacinity. I know you can get from Houston to Bay Area Blvd.Park and Ride. From there I guess a Taxi or a Friend and you can get to Nasa which is close by. Kemah boardwalk. There is the Bay Area Wildlife refuge, And Galveston which is the most distance from Houston but could be worth the time if you can get there. I hope you have fun ... and be prepared for the heat and humidity.