This story appears in the May 2017 issue of National Geographic magazine. A few years ago I was on an assignment in India. I had a day off, so I went to the Mullick Ghat flower market in Kolkata.

Kolkata is one of 15 cities hosting the 8th ... showcasing vibrant scenes like an Indian flower market. Another must-see is Francophonie in All Its Forms, an AR-enhanced installation that ...