The roads cut through forests, crossed deserts, and scaled mountains. In addition to their system of roads, the Romans could take advantage of some 17,000 miles (27,000 km) of navigable rivers and canals.
ख्रिश्‍चनांनी याच रस्त्यांचा उपयोग करून जंगलांतून, वाळवंटांतून आणि डोंगरांवरून प्रवास केला आणि अनेक ठिकाणी प्रचार केला.