Natural bridges and arches generally start forming when water seeps between layers of sedimentary rock and expands the gaps between them. When the lower layers continue to erode or collapse, they leave the upper layers suspended over an open space. Natural bridges form and collapse in less than 20,000 years. They are young and short-lived, considering that the surrounding rocks might be hundreds of millions of years old.
The most noted natural bridges are in Wadi Rum at the GPS coordinates:
Other natural bridges and arches are found in Pella and rocky regions such as Wadi Dana and Petra.