I honestly can't remember; it was too long ago. At least 14 years now.
The oldest memory I have of a website is Hamsterdance, but I know that can't have been the first one ever, since it wasn't around when I first started using the internet.
Not a lot remains of the sites from 1997 and before, so chances are whatever I first found on it have long gone. And probably weren't that interesting anyway, else I'd have remembered them. There wasn't much on the internet back then; it was still viewed as more of a gimmick than a meaningful entity in its own right, so hadn't really taken off as an entertainment hub yet.