BOSTON — The Freedom Trail, a 2.5-mile red-lined path that connects 16 nationally significant historic sites, tells the story of not only the American Revolution, but also Boston's history. Beacon Hill climbs behind the State House. At the crest, the State House commands the ridge, the gold dome flashing when the light hits. Completed in 1798, it carries broad granite steps, brick walls, and a front lined with tall columns. The dome, wrapped in gold leaf, flashes in full sun and dulls when the clouds return. Beacon Street runs across its front edge, busy with traffic. Behind it, narrow lanes twist down the hill. Red brick fronts stand close, shutters pulled tight, iron fences set in line. The original cobblestone streets and gas lamps provide Boston apartments with an additional layer of charm.