Magnolia might be Gloucester’s best-kept secret — though anyone who’s discovered it will tell you that won’t last. This charming coastal village along the southern edge of Cape Ann has been drawing admirers since the late 1800s, when it was celebrated as one of the most beautiful seaside retreats on the North Shore. Today, the village center on Lexington Avenue has a lovely collection of local shops and restaurants, and the surrounding mix of historic homes, pine forests, and rocky shoreline hasn’t lost a bit of its appeal.