World class museums, landscapes, transportation, food, entertainment, and nightlife are only a few of things these most popular cities in the world for travel offer. Whether you want a bustling megacity on the beach or a city in the serene mountains, one of these popular destinations is guaranteed to suit your fancy. For for some more real time info on international travel, check out Get Your Guide.com or keep reading for a few my favorite picks, and maybe add them to your list of places to visit this year. Istanbul Straddling both the European and Asian continents, Turkey’s most populous city, Istanbul had…