The central artwork is a vintage-style National Park Service travel poster depicting the historic stone walls of Fort Marion. A prominent stone bastion, characteristic of colonial fortification architecture, stands on the right, casting a long, sharp shadow over the masonry. To the left, a tranquil moat reflects the fortification and the adjacent landscape, including a single, dark-foliaged tree standing near the water's edge.
The composition is clean and graphic, typical of mid-20th-century WPA-style poster art. The scene is bathed in a calm, flat daylight, with the stone walls rendered in warm beige and the moat and sky painted in muted shades of blue and teal. Large, simple clouds drift in the background, reinforcing the peaceful, historic atmosphere of the site.
Text integrated into the design includes the header "UNITED STATES DEPARTMENT OF THE INTERIOR NATIONAL PARK SERVICE" at the top, and the label "FORT MARION NATIONAL MONUMENT ST. AUGUSTINE, FLORIDA" at the bottom. The artwork is framed within a light-colored wooden structure that features decorative laser-cut detailing along the left edge and engraved text on the cover.