Find a Roman Bridge take a photo with your GPS in it, include the GPS co-ordinates, and try to provide a little history of the bridge.
I am including the co-ordinates of a Roman Bridge located in Tavira, Portugal. This Bridge was used by cars for many year to pass the River Gilão. Now it is only for people walking or using bicycles.
Normal locationless cache requirements apply - one find per geocacher, each location can be logged only once. The Roman Bridge must have been built by Romans or be like one.