Either the grocery store or a relatives house.
Other than their first ped appt:
DS1 to the Museum for Lady Diana's tribute exhibition. We had the tickets long before he was born. The exhibition had her wedding dress and other beautiful stuff she wore/had.
DS2 to DH's work.
Oldest dd we stopped to see dh's great aunt on our way home from the hospital, It was around her birthday so it was a great present for her to see her great great niece when she was 2 days old.
Youngest I honestly can't remember, (bad mommy moment)