The Pont du Gard is one of the main monuments in Provence, inscribed on the UNESCO world heritage in 1985. It’s a remain of the very impressive aqueduct built during the 1st century AD, that linked the Eure’s spring (next to Uzes) to Nemaussus (current Nîmes). Based on the De Architectura from Vitruve, this work is about 50 km long with one of the smallest drop known: 24cm a kilometer. Even if the Pont du Gard is just a piece of 200 meters long, it is the most majestic part of it. It’s 50 meters tall, and 3 arches levels make it cross the Gardon river. Above the last level takes place the channel where the water used to pass , there is still a part covered with slabs. This technical masterpiece, old from 2 000 years, is set in a characteristically natural site: limestone rocks, green oaks, olive trees. One of the most visited site in France, it has been first done as a practical work first and not as a monument.