Lisbon’s tiny Taberna da Rua das Flores is almost always crowded, with barely enough room for staff to explain (and often translate) to hungry clients the dishes chalked up on its only blackboard menu. With around 10 marble-topped tables in a narrow, vintage-style eatery that takes no reservations, its small scale and increasing popularity makes for a challenging place to serve food – and yet, the staff are always smiling. The restaurant’s original, contemporary take on the forgotten tavern fare of the city, as well as its patient service and shared love of local ingredients, make it well worth the waiting time.

At Bar do Momo in Tijuca, there are many things to celebrate, but the two dishes starring jiló are particularly magnificent – and show how this little gastropub punches well above its weight. A green, meaty, slightly bitter cross between an eggplant and a pepper, jiló was brought to Brazil from West Africa during the slave trade. At Bar do Momo, the vegetable is served two ways: One is the jiló recheado, not unlike a chile relleno, stuffed with beef and mozzarella cheese that melts into a savory broth. The other is the only Brazilian guacamole worth your time: made from tangy pickled jiló, red onion, tomato, lime, cilantro, and Brazilian dedo de moça pepper.

Healthy eating and Chinese food are often hard to combine, but Karen Chen has discovered the recipe. After the success of Jianguo 328 (a homestyle Shanghainese restaurant that forgoes MSG and uses filtered water to boil its excellent noodles), the Taiwanese restaurateur decided to look west – where spice is king – for her next venture: Yi Zhang Hong. The friendly Sichuan restaurant is cobbled together with a narrow staircase leading up to cheerful dining rooms over three floors. On each level, bright folk art hangs on white walls above long banquettes and blond wood tables, and the red-tiled bar on the first floor is decorated with bottles of imported wine and beer and canisters of local tea.

Green peas, grape leaves and squash are on offer at the market in the lovely neighborhood of Kuzguncuk, an essential component of our Born on the Bosphorus tour.

Istanbul’s Aksaray district is a difficult place to get to know. It's probably the most diverse district in all of Turkey and with a very high turnover rate. Those Georgian ladies you saw dragging an overstuffed plaid duffel down Buyuk Langa Caddesi yesterday? They might be halfway to Batumi by now. The Syrian family by the bus stop? They may be on their way to meet a man in Izmir about a boat. Who knows? Aksaray’s unknowableness makes some locals uneasy; there's got to be mischief in all that motion, with all of those foreigners. Such is the stigma of Aksaray, den of thieves.

Before thousands of Syrian and Lebanese immigrants arrived in Rio at the beginning of the 20th century, colonists organized the old city according to geography, chance and Spanish and Portuguese planning conventions. This meant stores in the same category – ironware, shoes, musical instruments – were grouped together, sometimes even allotted their own street. If you needed wholesale fabric, you headed to a different road than if you needed a new kitchen pot. When hard fortunes amidst the breakup of the Ottoman Empire brought residents of the regions surrounding Syria and Lebanon to Rio, many put down roots in an area then called “Little Turkey” on Alfândega Street, near the port

Locals are crazy for Ali Usta's çiğ köfte. Ali Usta is a delicious character who has his tiny shop in the backstreets of Istanbul's Spice Bazaar. Çiğ köfte made with bulgur, herbs and spices suits every vegetarian's palate if one can eat hot, spicy food. This huge container is empty by late afternoon. Be there on time! A favorite stop on our Culinary Secrets of the Old City tour.

In landlocked Mexico City – the nearest coast is 250 miles away – you might think that it would be difficult to find fresh seafood. However, ever since Aztec times, the ocean’s bounty has been brought to the valley daily. Back then, the Aztec emperors got their goods using a system of relay runners that covered those hundreds of miles from sea to city per day. Things require less footwork today: technology and Mexico’s highway system allow daily deliveries of fresh seafood to the capital from the Pacific and Gulf of Mexico coasts. That said, feeding the Mexican capital’s fish craving still requires some hustle.

The era of Portugal’s seafaring might was so long ago, it seems almost like a myth – one still patriotically related by locals today. Gastronomic evidence of the country’s imperial past remains, however, particularly in Lisbon, where Angolan, Brazilian and Goan eateries can be found among the many other restaurants serving non-Portuguese food. Yet, despite Macau being under Portuguese control for around four centuries, passing into Chinese administration only in 1999, Macanese cuisine is still a mystery. Lisbon has yet to see even one Macanese restaurant open. There is a place here, however, to eat food from Macau: a cultural association in between Alvalade and Areeiro on a main road that leads to the airport, far from Lisbon’s center.

The oranges are beckoning shoppers at the farmer's market in Keramikos, central Athens. This market is a featured stop on our downtown Athens tour. Already pleasant and bustling in March at the time of this photo, imagine what it's like in May!

The triangle of Kurtuluş, Feriköy and Bomonti represents an Istanbul on the verge of fading away. Though still inhabited by significant numbers of Greeks, Jews and Armenians, there are more local churches and synagogues than are used by the remnants of those diminished communities. The numerous schools, houses of worship and cemeteries are relics testifying to the cosmopolitanism that once defined this segment of inner Istanbul. Another nostalgic quality of the area is its small-business culture, still thriving, yet on the verge of a major shift.

Carmen and Eduardo’s story could be an allegory for the rise and uh-oh moment of Brazil’s new middle class – except their tale is a real one, one that ends with a really nice savory fried pastel that’s become a midnight munchie hit with their neighbors in Rio’s iconic City of God (Cidade de Deus) favela. The pair’s life together started early; they met when Carmen, now 30, was just 12 years old; moved in together when she was 14; and both converted to evangelical Christianity and married in a church when she was 18. They came to the City of God, well-known from the book and film of the same name, looking for a more economical housing option.

The biggest döner kebap in town with Asım Usta, building his döner fresh every morning since 1973! If you come for late lunch or dinner, you're too late! Locals start to eat this around 10.30 am. Very popular in our Born on the Bosphorus walk.

How thrilling to know it’s possible to reach far back into Japan’s gastronomic past merely by visiting Azabu Juban’s Sarashina Horii Soba for a bit of “living history” in the form of a pleasantly simple meal. The Sarashina cooking lineage stretches back over 200 years and is always evident in the shimmering, high-quality plates of buckwheat noodles coming from the kitchen. In 1798, Nunoya Tahei, a Mastumoto City textile merchant famous for his soba skills, founded the Sarashina soba lineage when he was encouraged by Hosina, the local feudal lord, to open a shop making a style of soba popular in the Japanese Alps area of Nagano.

Istanbul's Samatya neighborhood is home to one of the city's many sprawling weekly markets, where one can find excellent Ezine, a white cheese from a district of the same name in Çanakkale, at modest prices.