This photo is credited as being the pool at Hotel Shelton in New York, but it doesn't match other images of the Shelton pool, so I believe this is another location. Nevertheless, on this day there appears to be some kind of water-spot activity with Houdini in attendance. Can you find Harry?
Click to enlarge.
Thanks to Alex and Keli Hindenach of the American Museum of Magic. Click the links below for other rare unpublished images from their collection.
UPDATE: Our good friend Perry from NJ has discovered the location of this photo. It's not the Shelton, but it is a location with a strong Houdini connection. This is the "Roman Bath and Swimming Pool" aboard the S.S. Imperator, the ocean liner on which Houdini performed for Teddy Roosevelt in June 1914. Below is a photo from the website GG Archives.