pont du gard, france. ancient three-tiered aqueduct, built in roman empire times on the river gardon, provence

aqueduct europe european france gard gardon nimes pont provence roman achievement ancient antique arch archaeology architectural architecture archway attraction bridge culture engineering heritage historic historical history landmark landscape languedoc monument nature old outdoor reflection river scenic sight sightseeing stone stonework summer sunlight travel unesco water france three-tiered built empire times gardon tourist destination sunny day