I actually didn't write anything for that part of Tufts' app. There isn't really much room, and if you read the instructions for it (its a pdf file...
http://www.tufts.edu/med/admissions/2005_2ndary_app_instructions.pdf), it actually says that for "the ovewhelming majority the correct answer is no. " It goes on to say that leaving it blank is perfectly acceptable, and that you shouldn't feel the need to turn to research or creative writing.
What I took from that was that they didn't want to see 5000 apps with the same BS about location, curriculum, etc...that doesn't help them differentiate. If however, you have family, a spouse, or some other need to be in Boston, or you have some connection to Tufts, then by all means write about it...otherwise I wouldn't reach for answers. As hard as it was to leave that space blank, I just checked no and moved on.