Translation of enclave

I want to improve my level of English. Have you ever been in the U.S. and in which states have you been? I've been in England, Scotland and Ireland, but unfortunately, I have never been to America.
My mother tongue is Spanish. For one year I lived in Spain. I'm from Huston, Texas, USA, originally. I want to study Spanish literature next year. I have already been to my professor to discuss it.
I signed up at Vocabulix long time ago and I did not use the account, I even forgot it. But I am always remembering it when I receive newsletters or when I am contacted by other Vocabulix users.