Orvieto Orvieto sits on top of spectacular vertical cliffs of volcanic tuff that seems to erupt from the most striking green landscape.  Miles of emerald green trees, farm land and vineyards worthy of any postcard.  Sit awhile.  Soak in the view.   Umbria is known as the ‘Green Heart of Italy’.  It’s easy to see why. Etruscans, Romans, Popes, secret passageways! …