Colonial Williamsburg...in Virginia--ie The colonies" ...is, AFAIK, open to the public most days of the year. It is an amazing place--most of the original building from the 17th century are still intact and a stockpile of 17th century brick is kept to do repairs on them.
I'm not a great fan of "tourist traps" or "theme parks" but I was impressed. Very much so.
The only thing that detracts in any way is the current managerial meme of politically correct history. They won't display George Washington's uniform or his sword (or so I'm told) because it's too militaristic. Again this policy is "across the board."
Other than that, it may not be of much interest to people from countries that have hundreds, maybe thousands of buildings that are centuries and centuries old. But on this side of the pond we have a particular blindness with regard to the virtues of the past. Or the lessons we can learn from them.
I once took a business associate from England to "The Oldest Pub in Australia" turned out that his house was 50 years older than the pub.