The Thomas Alma Moulton (T. A. Moulton) Barn on Mormon Row is definitely one of the two most well-known buildings inside Grand Teton National Park in Wyoming. The other is a barn built by his brother, John Moulton, which sits about a quarter mile from this one on the same road. Construction on this barn began in 1912 and work by Thomas and his sons continued until 1945 resulting in the final structure seen here.
I took this photo during our 2016 NxNW expedition to the park.
For the technically inclined...