The Valle d'Itria of Puglia focuses an incredible Mediterranean architecture of "white cities”. Four towns, apparently similar but each with a different soul. Martina Franca, with a popular architecture punctuated by spontaneous palaces and Baroque churches. Locorotondo, with its concentric plant from which the name, is a true urban monument. Ostuni, an unreal total white casbah with the medieval cathedral like a crown on the highest hill, the earth. Cisternino is one of the most beautiful villages of Puglia, a small untouched jewel of spontaneous architecture, made of terraces and stone stairs.