The Breakers - this is the Rockefeller’s summer home in Newport. It’s open for tours, and though I don’t recall the prices being crazy, it’s definitely been a while.
It’s so ostentatious and over the top, but beautiful, and full of wonderfully made things.
I think it’s interesting to consider our modern billionaire class as equivalents to Rockefeller’s gilded age.
Oh, and while you’re in RI make sure to get a Del’s frozen lemonade.
Newport has some interesting shopping. Get some stuffies (stuffed quahog clams) if you like seafood. They should be eaten with a squeeze of lemon and the cheapest vinegar and cayenne hotsauce you can find.
Theres a killer arcade called Freeplay in Providence. One fee <$10 to get in and all the games are set to free play. Great pinball selection if you're into that. Cheap beer and okish food while you're there. 21+ most days.