This map covers the following areas: Main Boston Map 1:23,000 Downtown Boston Map 1:17,000 Boston Regional Map 1:507,000 Boston Rapid Transit Map (MBTA Subway & Trolley Stations)A good Boston resource, but only for downtown. Admittedly, that's all these maps are supposed to be for, but still, given the importance of Cambridge to the greater Boston area, a bit more effort might have been made to squeeze in more of it - at least up to Harvard Square. That's a fairly minor quibble, though, and this map shows the usual Streetwise quality in all other respects. The colors of the MBTA subway lines on the map aren't quite right, but they're close enough for government work, and the street index is its usual indispensible self. If you're coming to Boston, snag one of these - they're much hardier than paper maps, and very clear.