The world is home to some 4,416 cities - from the crumbling grandeur of Rome to the bristling, ultra-modern towers of Shanghai. It includes tiny Adamstown, a microscopic settlement in the Pitcairn Islands with a population of only 48; it includes Venice, a floating city laced by idyllic canals and breathtaking palazzos. And like the people who inhabit them, each has its own distinctive personality, allure, photo-worthy moments, and reasons to pay them a visit. Here, in our humble opinion, are the world’s most beautiful cities. 1) Florence, Italy While Rome may get the credit for being Italy's most historic city, Florence holds the flame for sheer, unadulterated Italian beauty. A walk down any cobblestone street will reveal astonishing piazzas and cathedrals—and the...