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While proud of its history, Boston has adjusted well to modernity. In 2004, Boston finally completed its decades long “Big Dig” project. The stunning Leonard P. Zakim Bridge, with a width of 180 feet, is the widest cable stayed bridge in the world and the crowning achievement in the single most expensive feat of civil engineering in human history. The completion of the project has made a city already laced with stunning parks and colonial era architecture even more beautiful.