When you think of Boston home architecture, federal-style homes and saltboxes come to mind before modern ranch-style houses. But if you've ever driven through the back roads of Lexington you'll have caught glimpses of many of these modern homes in woody, tucked-away neighborhoods. The weekend before last, Lexington's Historical Society sponsored a tour of mid-century built houses in three modern 1950's Lexington neighborhoods: Moon Hill, Peacock Farms and Five Fields. We tagged along with our friend Karen and were able to see the grounds and insides of some amazing homes. Click after the jump to see some more things we discovered about these neighborhoods.