This image shows the road under the Natural Bridge, a formation of limestone created by the creek which runs alongside the road.
Tichnor Quality Views, Tichnor Bros., Inc., Boston, Mass.
The description states:
NATURAL BRIDGE — One of the Seven Natural Wonders of the World. There is no other structure like it. The Lee Highway, U.S. No. 11 passes over Natural Bridge. It is higher by 55 feet than Niagara Falls. The mean height of the bridge from the stream below to its upper surface is 215 feet, it has a span of 90 feet between the walls, width averages 100 feet and the arch is 40 feet thick.
Hotel and cottage accommodations. Open all year. Illumination at night.
–U.S. Highway 11 still passes over this span. The card was used and is dated 13 August 1951.