Nearly 50 historic sea captains' homes are lined up along MA 6A (the Old King's Hwy) in Yarmouth Port, on a 1.5-mile stretch known as the Captains' Mile. Most of them are family homes these days (or genteel B&Bs), so you'll be doing much of your viewing from the sidewalk. You can download a walking tour brochure from the website of the Historical Society of Old Yarmouth (HSOY), which admirably outlines the history of many of the houses.