We’ve written previously about the immense diversity of Mexican cooking: Every region has unique traditions that build upon ingredients common to much of the country. And yet there are a few regions that stand out for the variety and vividness of the flavors, colors and tastes found there.

Though the summer intensity has passed in North India, a glimmer of cooler mornings awaits, on the sidelines of Old Delhi. Dust never settles, it just gets redistributed and then the heat lacquers every surface. Each corner of this ancient city is coated with infinite layers: strata of memories, migrants, languages, castes, foods, architectures, monumental and streetside mandirs and masjids. Even sounds and smells alight upon or crash against ears and noses.

La Boquería is undoubtedly one of the most famous markets in the world, but there are 43 markets spread across Barcelona, each with its own unique charms. Once a year, they can be experienced all at the same time, in the same place. From October 17 to 19, 265,000 visitors thronged the square in front of Barcelona Cathedral for the fifth edition of the Mercat de Mercats (Market of Markets) festival, which gathered 40 stalls, 30 local artisan producers, 40 chefs with 17 Michelin stars between them and 14 of the city’s best restaurants. The festival offers an amazing opportunity for locals and tourists to taste the dazzling array of Catalan flavors and to get to know the city’s neighborhood markets.

Whether we’re talking fat-free, gluten-free, organic, MSG-free, Paleo or vegetarian, every regimen takes on new challenges and pitfalls when you are traveling or living abroad – especially in a country like China, where you may face a language barrier.

When the seasons change from summer to winter, your body requires different foods to stay healthy – as anyone who has come down with a fall cold can attest. Traditional Chinese Medicine (TCM) says that the changing temperatures result in a dry season, medicinally speaking, meaning that your body lacks fluids, affecting your lungs and throat, as well as your digestive systems. Autumn is also a chance for you to build up your body’s immunity before the harsh winter. Nourish yourself with these foods now, and you’ll be thanking yourself when winter sets in.

Kim is an avid traveler who divides her time among sniffing out new ingredients in markets, poking through bookstores around the globe and teaching at Grand Arts High School in downtown Los Angeles. Poon is a food, travel and lifestyle photographer based in Los Angeles.

Editor's note: We're sorry to report that the vendors and restaurants at Sipalou Lu and Fangbang Lu have suffered the same fate as those on Wujiang Lu and have been shut down. For street food, head to the area around Er Guang. In the lead-up to the 2010 World Expo, the government tore down one of Shanghai’s most famous food streets, Wujiang Lu, so the city would appear more “civilized” in the eyes of businesspeople and tourists visiting from around the world. Sparkling cookie-cutter international brands replaced family-run hawker stalls, and Wujiang Lu’s fried bun purveyors and stinky tofu vendors were scattered across the city. But its sad fate, which left a gaping hole in the city’s culinary landscape, also created new opportunities, allowing Fangbang Lu to become one of the city’s top food streets.

In Mexico, magic is all around us. It’s in the architecture, history, way of life – and, of course, the food. The country’s Ministry of Tourism is no stranger to this magic, and in fact, fully grasping its economic possibilities, it created the Pueblos Mágicos program in 2001 to recognize villages that are unique and historically significant. There are now 80 such pueblos mágicos across the country, and one of our favorites is just a short drive away from Mexico City.

Carnitas, a pork dish that originated in the state of Michoacán, can be found in restaurants, markets and street stalls all over Mexico City – it’s a fixture of the chilango diet. The other day, we received an invitation to visit a carnitas place that our host said would blow our minds – and that’s definitely the kind of offer we never refuse.

The hardest part about dining in Hong Kong is choosing among the overwhelming number of options. It’s one of the most densely populated cities on the planet, with more than 7 million mouths to feed – and many with demanding palates. You can stand on just about any block in the city and find several affordable eateries above, below and across from you (kind of like Starbucks in Seattle).