I remember planning a trip to Ontario Canada. I read all the advice to "just spend half a day in Niagara Falls - do the boat tour and go behind the falls, then get out and go to Niagara on the Lake". I scheduled myself so I arrived around 3 p.m. on day one and left around noon on day two. As I was driving away, I cried. Unlike all the folks who advised me, I LOVED Niagara Falls. I LOVED the tacky carnivalish Clifton Hill and I could spend forever gazing into the falls. Niagara on the Lake was a very boring place for me - it had the same overpriced tourist shops (although different merchandise) as NF, but had none of the electricity. My next trip I stayed 4 days, and on the drive out, I promised to come back for at least 7 days next time.
My point is that only the OP knows what is "worth seeing". What person A thinks is the most wonderful spot in the world, person B will think is a waste of time. To me, there is no place that is "a waste of time" - there are only places that don't interest me. While I will happily spout off the wonders of Niagara Falls, I will leave comments regarding Disneyland to those that can do it justice. That allows the OP to make choices best suited for his family.