Undeniably the most elegant and cheerful of all Roman piazzas, Piazza Navona was built on the Stadium of Domitian in the 1st Century A.D. and still preserves its outline. The piazza remains a highly popular meeting place for Romans and tourists who drowsily soak up the sun and atmosphere in open air bars dotted around it. Used in ancient times for various athletic games and competitions, although it never witnessed the carnage offered in the Colosseum. Today tourists often enjoy sitting for street artists who, on request, either sketch a faithful portrait or draw a caricature of their models in a few minutes. Not to be missed: The Fountain of The Four Rivers and Church of Santa Agnese in Agone.