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If not the trip to Barcelona I could say that I didn't feel the spirit of Spain there at all.

Gdyby nie wycieczka do Barcelony to mogłabym powiedzieć, że w ogóle nie poczułam tam ducha Hiszpanii.

Without/Absent the trip to Barcelona, I couldn't say I felt the spirit of Spain at all.
If it weren't for the trip to Barcelona, I couldn't say I felt...

Dziękuję :) Czy mógłby ktoś sprawdzić jeszcze to zdanie:
If I were known that you collect postcards I could send you one from there.
Gdybym wiedziała, że zbierasz pocztówki, wysłałabym Ci jedną stamtąd.

Also:
But for the trip to Barcelona, I couldn't say I felt...

Had I known that you collected postcards, I would have sent you one (from there).

dziękuję za pomoc :)