I'm conducting three architectural walking tours on four Saturdays in September and October. Click on the links below to purchase tickets from the 92Y. Saturday, September 12, 11am - 1:30pm Saturday, October 10, 11am - 1:30pm The High Line and Its Environs Trek the High Line taking in the park and the surrounding buildings and step off to get a closer look at select buildings. Saturday, September 19, 11am - 1:30pm Columbia University Look at recent additions to the campuses of Columbia University and Barnard College in Morningside Heights, take a sneak peek at Columbia’s expansion into Manhattanville and head up to Inwood to see Columbia’s new athletics complex. Saturday, October 17, 11am - 2:30pm Brooklyn G Train Tour Hop on and off the G train from Carroll Gardens to Clinton Hill and Williamsburg, taking in townhouses, campus facilities and other buildings along the way.