Back of the postcard. Some of the wording is not readable. It looks like the postcard was sent to a woman, Miss Stewart of California, from Paul Smith.
The black and white, skyline view of New York City with Lockheed 14 aircraft flying in the foreground. Typed onto script included with the image: "Howard Hughes plane Lockheed 14 in flight over lower New York City. To right in the background can be seen New York City's three bridges of the lower East River from front to rear: the Brooklyn Bridge, Manhattan Bridge, and the Williamsburg Bridge."
Long shot of the Lost City site (Pueblo Grande de Nevada), near Overton, Nevada, with the northwest arm of Lake Mead in the distance. The area is near the ruins of St. Thomas, Nevada, another nearby extinct town, submerged by Lake Mead.