I remember that I explored the Baker mills on Martin Luther King Day in 2006. I remember this because, after a very dicey entrance which almost plunged me and my camera equipment into the Neponset River, I emerged in the mill building to find construction lights on and workers tools. I had chosen to explore the mills on MLK Day specifically because I knew they were under renovation and there might be activity there, and I was right. There wasn't too much left to see in the mills, but it was still very cool to explore this important piece of Boston's working history.