Take the train from the Nice Chemins de Fer de Provence station and ride through the country side and mountians.  Stop at Entrevaux on the way and walk the fortified city and hike to the Citadel for a great view.  Then reboard the train for Annot for a walk to the small villiage for a cappuccino.  Continue on to Digne les Baines or return to Nice.  The ride follows the river through the mountains.  About 26Euro per round trip ticket.  On and off as many times as you like.  

  Entrevaux Train Station Entrevaux CityEntrevaux Citadel Annot Train Station Villiage of Annot