I've traced my family tree back to each ancestor's departure point before coming to America. I have records that go further back but I don't fully trust their reliability beyond that.
On both my mother and father's side, I'm descended from one of the Mayflower Pilgrims. (This creates a very convoluted family tree at one point, ha, ha.)
On my father's side, I'm also descended from early Dutch families who settled in New York.
A few of the New England ancestors were Loyalists during the Revolution and moved to Nova Scotia for a while. They eventually moved back to New England.
My most recent immigrant ancestor arrived in Boston from the Azores (Portugal) in 1860.
One of the former Nova Scotians married the immigrant from the Azores. Those were my great-great-grandparents on my father's side.
I haven't finished all my research yet. It can be overwhelming. So far, the basic print out fills an entire wall in my house (lots of adhesive tape involved, ha, ha).