The stone bridges in this gallery come from a variety of places ranging from North America to Europe. I have the good fortune of living near Monroe County Illinois where there are a concentration of these old bridges. Once numerous in the 19th century, they are threatened by the cost of maintenance. The advent of automobiles and new roads has bypassed many of these and they are no longer in use. Many old stone bridges are only open to pedestrian traffic nowadays but they stand as a testament to the engineering skills of a bygone era.