The Loma Prieta Earthquake knocked down one of the freeways that cut San Francisco in half during my childhood.
This week, more 21 years after the earthquake, the old freeway off ramp lot is getting repurposed as a short term urban farm (the developer who it had been leased to is waiting for the economy to revive before turning the lot into housing).
Here is the article from the SFStreetsBlog (great photos!).
