Boston's downtown and North End grew up before cars, which means the streets twist and narrow in ways that feel more European than American, a pleasant contrast to the grid-planned cities elsewhere in the country. The Freedom Trail, a marked path through the historic centre, gives structure to a walk that might otherwise feel disorienting given the irregular layout.
The city is small enough that many major areas, from Beacon Hill to the waterfront to Back Bay, are within a comfortable walking distance of each other, often closer than visitors expect from a major American city.
Winters bring snow and genuinely cold, biting wind, particularly near the harbour, which makes walking considerably less pleasant for a good stretch of the year. Spring, summer and early autumn are far friendlier to a long day on foot.