I've been thinking lately that Boston's Innovation District is really composed of four distinct neighborhoods, when it comes to clusters of innovation-related companies. So I created the Google map below.
You have to squint really hard to ignore all of the great financial services, fishing, and brewing activity that takes place in the district. It's also home to Au Bon Pain's headquarters, a working dry dock, the Boston Convention and Expo Center, and a couple of vast parking lots.