We arrived at Natural Bridges in the late afternoon but we had time to take the road loop and view the bridges from above. With more time, you can take trails into the valleys and see the bridges up close. The photo below shows a bridge in the centre of the photo — it is a little difficult to pick out. These bridges are formed by meandering river beds in the standard ‘S’ patterns. The water flows in a deep cut and the ‘S’ collapses on itself and erodes the rock away between adjoining serpentine loops. The water then flows through the new hole and carves a bridge.