These are the places I have visited in Texas:
Austin
(1991, 1997)
Houston, NASA
(1997, 1998 and 1999)
Galveston
(1997 and 1998)
San Antonio, SeaWolrd
(1997)
Dallas, Denton, FortWorth
(1990 to 1999)
Plano
(1995 to 1999)