Not badly-rendered, just low-poly. Pinna Park is so far away from Pianta Village that unnecessary detail would just be an unwelcome bogging-down of the game. I'm surprised there's more than just a blurry 16x16 texture in PP's place, for Pianta Village...
As much as I hate the game, I'll commend Sunshine for its insistence to keep the parts of the island visible when you would expect them to be.
Yeah I didn't know the proper term, lol. But yeah it's quite surprising too. Especially because if you look the way that Pinna Park is facing in relation to Pinata Village, you shouldn't be able to see the back of it (aka where I am in the picture). Another interesting thing off my head is that you can see Sirena Beach from Gelato Beach but without hax you shouldn't be able to see it (I think). And there's more too but they either weren't that interesting or I can't think of them off my head at the moment.
But where is it exactly and how do you get there? Hax? Wierd Rocket Nozzle bug? Behind pachinko board? (Again with hacks}
I used this thing called the XYZ hack in AR. It's a 40 line code and there's only like 2 other people I've seen on youtube who have it but neither really show what it can do. It's pretty interesting but I wouldn't recommend wasting your time putting in the painfully long code like I did. Basically it lets you go through everything and go through every physical boundary in the game so you can go "out" of levels and past the hard-coded walls.
One more thing is that I realized whoever developed the game did a really good job too. It doesn't freeze or glitch up at all when you're doing it no matter how far out of the level you go. The only thing is that sometimes when you go into the episode select screen it freezes but I found a way past that.