Can you guess what year this photo was taken? We'll update this post later with the answer, and more photos and details.

UPDATE: This photo was taken in 1939, and the caption reads: "A view of construction workers taking a break during the construction of the Queens Midtown Tunnel in New York City." The tunnel opened to traffic on November 15th, 1940, and was designed by Ole Singstad. Here are some more photos taken during the construction process in 1939.