Over the weekend, we looked at just a few of the many OHNY sites: the Newtown Wastewater Treatment Plant, an MTA Substation, and the Brooklyn Navy Yard. Here's a gallery of some of our other favorites, submitted by Gothamist users.

If you've got any pictures to add, please tag them "Gothamist" on Flickr (make sure you make sizes at least 640px available), and we'll add them to this gallery. Or put links to your OHNY blog coverage in the comments. Thanks for contributing!