Hello Elliott,
Well, I wish I could say I scratchbuilt some really wonderful things...but...
Primarily, both kits were designed on separate flat bases. I had to do quite a bit of tinkering to add depth for the stream and bay. Joining the two kits together also presented some challenges as the two hilly/cliff areas needed alot of internal formers to join up like I wanted.
Beyond that, a lot little (ha! no pun intended) details: a small cemetery behind the church, the pool and swing set in the backyards, signs over the shops, the sidewalk cafe with umbrellas, the rooftop gardens, all of the streetlamps (which were made out of bristle and seeds), the marina docks, the railway signs and signals, the boat ramp, the window box planters, and all of the bridges and protrusions that were a (welcome) side effect of creating the bay and stream bed.
Also, the vehicle placement is entirely arbitrary, I used vehicles from many sets and sources. Some are 1:100 scaled down to 1:300. The blue crane is from an ABC magazine, and some of the rolling stock is from Lokostranky
http://www.lokostranky.net which as I mentioned are quite cool.
I also made about 10 more trees and tree groups. The trees as I mentioned earlier were...interesting. Each one has 5 to 7 parts with lots of scallops. I think I went through about 35 #11 blades on this thing.
I just want to say again, if anyone is thinking of building these two, I cannot recommend them highly enough. Or for that matter, any of the Minibox offerings.
http://www.minibox.cz/index.html