The middle of the twentieth century was, in many ways, the height of modernity. And nothing symbolised modernity for North Americans quite like the car. Hence the construction of freeways. But on the other side of these freeways lay slums, mostly comprised of Victorian-era housing and other buildings. In some places, like New York City and Boston, the buildings were even older. These dilapidated, broken down old buildings mocked the wealth of their cities.