Subject: Summer homes of rich and famous in Northeastern USA

Hi Ziners, In the Fall I would like to visit some of the grand old summer homes (Rockefellers, Astors, Vandebilts, Carnegies, etc.)in the Northeastern USA now open to the public. I can't find a list and I wonder if some of our Ziners are familiar with some of these houses and could give me some information. Thanks. Marge from Ottawa