Unusual vintage photo

I was talking about rare photos from years gone by and this one image has really flabbergasted me all week. The Highline in New York tweeted it out, as part of a feature that was in Curbed New York. It's literally a steam engine in the 1920s, going up 11th Avenue, under where the Highline is today.

It's just hard to imagine this, a huge locomotive coming up the avenue, with a horse and carriage to the side and a vintage (new at the time) car to the left. I love this photo. This 1929 image is described on Curbed New York like this:

"Before the West Side Improvement Project created the High Line, trains ran down Tenth and Eleventh Avenues. Here a New York Central Freight Train heads south on Eleventh. A flagman, or West Side Cowboy, should be preceding the train, but in this shot is out of the frame. The train is passing the George Kern building [near 41st Street]. Kern was a packing, wholesale, and retail distributor of pork and beef products, which was bought by Adolf Gobel, Inc., in 1927 for $10 million."