Crest is a commune in the Drôme department in the Auvergne-Rhône-Alpes region of Southeastern France. Its inhabitants are called Crest…Crest is a commune in the Drôme department in the Auvergne-Rhône-Alpes region of Southeastern France. Its inhabitants are called Crestois in French. The Tour de Crest, one of the highest medieval keeps in France - 52 m. Its height dominates the town. The tower was part of a castle which guarded one of the entrances to the Pre-Alps in Drôme. The site offers a large panoramic view. There are various exhibitions in the castle plus information about the Tour's past including the fact that it has served as a prison in the past.