Welcome to the forum.
I've seen the Sox play in Pittsburgh, Anaheim, Cincinnati, and KC.
I've also seen games in San Diego, Minnesota & St Louis (old parks for all 3), LA, Oakland, Milwaukee, both Chicago's, Seattle, Tampa, Boston, Toronto, Baltimore, Washington, and Detroit.
Fenway, PNC and whatever the M's call their park now were my 3 favorites.
I'd really like to get to the Bronx, Denver and San Francisco next.