We stopped at Concord just before visiting Lexington.
So Lexington appeared to be a "deja vu". If we had stopped at Lexington before Concord then Concord would have seemed like the clone.
So we spent only a quick half-hour touring and photographing through the car window for the most part.
Wikipedia info: 31000 residents in 11000 households with 40% families.
Average household income (two workers) was an impressive $100000 annually.
Tourist sights --- Battle Green, Old Belfry, Revolutionary Monument, Buckman Tavern, National Heritage Museum, Old Depot
official website is:
http://ci.lexington.ma.us/