My first recommendation would be to watch the PBS American Experience documentary "The Rockefellers" (definitely available on Netflix if nowhere else). It's a quick fascinating history of the family, the ruthless business practices that made them rich but hated, and the incredible philanthropy that followed. I visited Kykuit with three other adults, and we all agreed that the gardens and... more

This is a destination not to be missed. While I had stopped off here on a previous trip, I did not get a chance to explore. There is so much to see that I would allow at least 3 hours, more if you have the time. There is a map with some of the more notable names and landmarks but... more