Ok, so, first, here's Monsterparts: http://gameswithothers.blogspot.com/2013/08/monsterparts-attribute-less-d.html
This is a simple but beautiful concept + context for a D&D-alike game by Pearce Shea. It's about kids facing horrible dark forces that the grown ups can't or won't see, and it's amazing and you have to read it. I fell in love (became obsessed) with it before I even finished the first paragraph, and decided to start designing a campaign for it.
I'm calling that campaign the Knights of Pemberton St., and I wrote up some quick and dirty OD&D-based (with a couple mechanics borrowed and stripped down from my own Madlands) rules here: http://marksman45.wordpress.com/2013/08/21/the-knights-of-pemberton-st/
So now I'm working on designing Pemberton Street itself. In addition to houses that all the people live in and at least one really big abandoned spooky house, it needs stuff. Like:
A bridge with a river that's much deeper and faster and colder at night
A wishing well that's dried up at night and leads somewhere unpleasant
An old, defunct water tower
Old, disused, walled-off tunnels that used to connect various cellars to a bomb shelter
A castle that is only there if you walk a certain route
And what else? Any ideas?