Open House New York has arrived! There are dozens of amazing locations open today and tomorrow in all five boroughs, so we're not going to be able to visit them all. That's where you can help us: please send your OHNY pictures to photos (at) gothamist dot com, and we'll put up the best ones tomorrow.

For our contribution, we tagged along on one of this morning's tours of the Farley Post Office Building on Eighth Avenue, which one day, if all the funding can be found, will become Moynihan Station. The building takes up a two full city blocks, so we were only able to see a small part of it- check out the captions on each image to hear what we learned on the tour. For more shots, check out Scouting New York's post on the building from earlier this week.