i have an idea u make a skybridge but just square across all of them and then u have 1 huge res u can do anything with!!!
Medieval town with different 'districts' like a poor area with wooden huts and a rich are with big stone houses. You could then do loads of other things like a market with shops selling things and maybe even an inn (hotel). You could do lots of creative things with this idea.
This is besides the point but how did you manage to get 4 lots right next to each other? You must be one lucky person
How about a tropical floating island as one (with waterfalls coming down the side), A giant volcano as another (erupting), A moon type one with cows and mooshrooms on it, and a sunken island with a pirates hideout in it?
- giant dinosaur - a space ship, UFO - floating city - chessboard with huge figures - cake, pizza - giant, fat cartman - titans - All the mobs - circus - Zoo ...
A large sphere in the middle of all four plots. four supports, one from each lot holding it up. As for the purpose of the sphere? I don't know. It would have to be over 64 blocks in the air though.