Last summer I visited places where I spent my childhood. The trees my father planted when I was a child had become big tall trees.
When you use 'spent' without had, it gets equated with the time when you visited i.e. last summer
I don't understand how it is possible in that case to write this first sentence without had, how it is possible that "spent gets equated with the time when you visited i.e. last summer" first you spent your childhood then you visited ,for me visited can't get equated with the time when you visited. Can somebody explain it to me