For the area around Harvard, you'll want something that doesn't look like a grid. Ideally the streets would be curvy but those are rare in Chicago. Maybe somewhere like here?
https://www.google.com/maps/@41.9326...7i16384!8i8192
or this?
https://www.google.com/maps/@41.9202...7i16384!8i8192
Having lived in Cambridge for 5 years though, it's hard to think of a place that looks a lot like Cambridge in Chicago... not enough wood frame buildings.
Logan Square Park might be able to pass for Cambridge Common?
https://www.google.com/maps/@41.9287...7i16384!8i8192