I have a sculpture garden on the mainland and while flying around the other day looking at my neighbors to see what was new or at least stuff I'd never noticed because I had my draw distance turned way down. I noticed an island off in the distance. I flew over and it was the cutest little coastal town with cobblestone streets and a wharf and a light house and a town square. It was built by the Linden Lab Department of Public Works. The build quality is very high. If you're looking for a machinima set..this might be something to check out. You'll have to watch your camera angles so you don't get the stuff on the next sim, but that shouldn't be too difficult. Here is the SLURL and some photos.
Town square with wishing well and assorted small shop buildings, including Mole & Mole Travel Agency for your virtual vacation needs. (people who work with the Dept. of Public Works use avatars with the last name of Mole - hence the company name)
A view of the sim from the light house end. There's a little beach there too with a row boat pulled up. Notice from this high angle you can see the mainland sims behind Barney's bay.
A view from the wharf. From this angle you can't see any other land. There are other sims to the right side of this picture. Check out that sea wall and the row of little houses. It was cute. There are stairs to run up and down and alleyways to pop out of.