Re: Galveston, Texas.... ?
I used to live at Clear Lake, just up the road.
There are some neat museums on Galveston. But if you drive up to NASA Johnson Space Center, my old employer, the Space Center Houston visitor center is no-miss. You can easily spend a day there, including getting a tour of JSC which will take you into the original mission control, etc. It's less than 1/2 hour from Galveston.
Near JSC is the Armand Bayou nature preserve. That's good for a couple of hours and you will probably see snakes and lizards galore.
And the Battleship Texas is just north of Clear Lake. There is a sub there as well. The battleship is a FANTASTIC exhibit and is one of the last real "Dreadnaught" class ships afloat. I think it was the same ship class as the Arizona.
And Galveston is home to some of the best Hot Tamales (served from carts) you'll ever have.
When I lived down there, the drug problem was so bad that you wanted to be off island after dark. The gunfire would start 10-ish. But I think it's a lot cleaner now, crime-wise.
Enjoy. It's a fun area...
Cheers,
Sirhr