I enjoy them as well if we're thinking about the same thing! Assuming you mean sites like that that are still up and floating around somewhere on the web without the support of an archive. I don't remember how I found most of them, but I have quite a few older ones that fall under the category of (seemingly) unchanged when it comes to certain graphical elements or untouched completely after a certain point in my bookmarks. Here are some of them:
https://candywrappermuseum.com/https://kontek.net/http://catb.org/jargon/html/index.htmlhttps://www.oldcomputers.net/I'm not sure where they are right now, but I
have (and still do) come across a lot of smaller HTML sites that fit your description of "lone" a bit better than most of these might. I'll try and share more in the future now that I know I have a reason to collect any I find into one place.
[Note: The Jargon site may be the only one I specifically found within a discussion on this forum.]