Milan isn’t an uncommon stop on many Italy itineraries, but it’s usually just an entry or exit point thanks to the city’s major international airport. Dig a little deeper in this northern Italian city, however, and you may find some reasons to stop and stay awhile. Of course there’s the many-spired Duomo (you can climb to the top and walk on the roof), and one of Leonardo da Vinci’s most famous pieces of art, “The Last Supper” fresco in the refectory of Santa Maria delle Grazie. But some of the reasons to visit Milan are fleeting, only available for a short period of time. In 2015, one of those reasons is Expo 2015 (the latest iteration of the World’s Fair, which is held every five years), to be held in Milan from May through October. The massive event is called “Feeding the Planet, Energy for Life,” and sub-themes include such things as food safety, food scarcity, and food as it relates to culture.