This is a really interesting concept. This isn't the first time I've heard this idea. I think it is an awesome idea, though, and I support it. Was any of this done in Japan? I heard there was, but I don't think that source really knew what they were talking about
I'd like to see interactive Pools for outside or Backyards for houses that you can add but they arent shown so it's still a castle but with an extra room woo.
A cave you can make on the beach. How it would work is by talking to Isabelle above the spot that you want it, this way you can put it on those private beaches that some people have. It will be an 8x8 room that you can decorate. Villagers and campers will sometimes be found inside. It will also be interesting to look for in dream towns. You can also put it on the side beaches to make it more hidden. You can not put flowers in front of the door so that you can spot it. The entrance will be one space wide.
I'd really like just to be able to put regular items on the beach, I wanted to stick Brewster's cafe in the alcove my beach has, and also stick some benches around the area. :V