"Urban development has changed the waterscape of San Francisco more dramatically than anywhere else in the state, from a natural creek- and dune-scape to today's modern sewersheds. Christopher Richard of the Oakland Museum will take us on guided photo tour, with historical maps and photographs, uncovering the unique features of San Francisco's primeval waterscape and how the city used and abused the many creeks and lakes as it grew. Richard’s presentation will feature the remaining free-running creeks in San Francisco, which you can visit."