There are so many Open House New York sites open this weekend, and so little time to see them all! So we picked two that seemed interesting: this MTA powerstation on 53rd Street (built in 1901 by Heins & Lafarge, with help from McKim, Mead and White,) and the Newtown Creek Water Treatment Plant (which we'll tour tomorrow morning.) We need your help to visit the rest: please send your on-location pictures to or tag them "gothamist" on Flickr, and we'll put up a gallery tomorrow night.