Three years ago, Twitter announced that it was moving into a deserted building in one of the worst parts of the city.
Twitter made the move because the City of San Francisco had created a new tax-free zone in that neighbourhood, known as Mid Market.
We took a walk around the neighbourhood in July 2011 to see exactly what Twitter was getting itself into. It didn’t look pretty. But Twitter made the move, and a bunch of other tech companies followed. Then came the residential developers. Then the other businesses.
Three years later, the change is startling. See for yourself…