Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
The photo was probably taken in the Hudson Valley area of New York, but it is not identified on the photo. It may be some type of May Day celebration, but I'm not sure. May, 1932. View full size.