I used to have this lot that was for sims 2 and had mushroom houses on the same lot with red rooves. Each house was one room. I remember I thought it the title didn't describe the lot well at all.
I originally downloaded it possibly as early as 2008, or as late as 2014. But it could have been older, as I don't know how long ago it was posted before I downloaded it.
I really want this lot and can't find it anywhere. If you have seen anything like it (for sims 2), please let me know. Even if you recall something about it - like the creator, or the site it was on. I thought maybe it was here. And maybe in The Fairy Tale Challenge. But something is different on this site, and now if you click on a challenge, you can only see the first few downloads, and not every download for the challenge. This is very frustrating and makes it impossible to do a thorough search since we can't search downloads by a challenge either.

I don't remember a fairy tale challenge- was that on this site?

For some reason a lot of challenges no longer show up under Themes.

https://modthesims.info/downloads.php?f=515

Any of these?
https://modthesims.info/d/259319/mushroom-dwelling.html
https://modthesims.info/d/254614/house-of-fairy-s.html
https://modthesims.info/d/133092/th...room-house.html
https://modthesims.info/d/257767/stiltskin-s-farm.html

Back in 2008, there was also the fantasy-themed "sister-site" to MTS that I can't remember the name of right now called Sapphiresims, could it be possible you saw it there?

I looked through the lots at http://www.parsimonious.org/sims2.html but couldn't find any mushroom-themed ones (they do have a lot of fairy/fantasy stuff, though).

I never knew there was a fantasy themed sister site. But then I joined in 2009. What happened to the downloads from it?

I'm not sure, but I don't think most of the downloads survived, unless someone have them downloaded.
(Sapphiresims, by the way)

Oh, I have heard of Sapphire Sims! I just didn't know that it was a sister site.

(I'm not entirely sure if it was, hence the quote marks . Potentially an affiliate site, or some such? I honestly don't know the difference. It's so long ago now I have no clue. They did seem to run with roughly the same site design)

I think Delphy (Tashiketh) hosted and maintained (coded) Sapphiresims.