The Gowanus AR Walking Tour uses the icon of the 18th Century Dutch Tide Mill, built by settlers to help transform the original Gowanus salt marsh into farmland.  This sustainable colonial machine was situated on tidal ponds, dug perhaps with the labor of enslaved African people. When the pond filled at high tide, the dam was closed.  At low tide, the water was released, thereby powering a water wheel connected to a grinding mill.  This sustainable colonial machine worked in balance with nature, but was also the first footprint of the residential and industrial development to come.  The Gowanus AR Tide Mill is a mash-up, reconfiguring historical machinery as a movie projector of images telling stories about the past, present and possible futures of the Gowanus neighborhood.