Built in 1928, the Market Street Bridge is a stone arch bridge that spans the Susquehanna River between Harrisburg and Wormleysburg, Pennsylvania.
A Fall landscape with leaf colors and stone formations ….
The central buildings of Machu Picchu use the classical Inca architectural style of polished dry-stone walls of regular shape. The Incas were masters of this technique, called ashlar, in which blocks of stone are cut to fit together tightly without mortar. Many junctions in the central city are so perfect that it is said not even a blade of grass fits between the stones.
Since this stone is not rolling it is definitely gathering moss