Using stones weighing as much as eight tons each, Roman engineers built arched bridges that were so skillfully designed that some of them are still standing after more than two thousand years.
Duke përdorur gurë që peshonin rreth tetë tonë secili, inxhinierët romakë ndërtuan ura me harqe që ishin projektuar aq me mjeshtëri, saqë disa prej tyre ekzistojnë edhe pas më shumë se dymijë vjetësh.