The mountain houses server was delightful, and spawned many memes such as "inkvoiid's maps are gone" and "Can I have op? Oops just killed everything". The server end date is still undetermined but I have many memories of this server, so it probably lasted a while.
There was a stongehenge-esque build out the front of inkvoiid and DumbleDog's houses, encircling a nether portal and some AFK fishers.
DumbleDog lived in a dark oak house atop a "mountain" (see caves and cliffs). There was an elevator connecting it to inkvoiid's house below. The house was multi-level, and there was a floor that was entirely rainbow wallpaper in item frames.
inkvoiid lived inside the mountain DumbleDog's house sat upon. It featured an elevator that connected to DumbleDog's house above. There was a stone brick hallway with chests in the walls.
Something happened on the server resulting in the maps hanging on the wall to disappear. This brought about the "inkvoiid's map are gone" meme.
It was on a mountain nearby inkvoiid and DumbleDog, that's all I remember.