While Athens’ more upscale neighborhoods have recently rediscovered the gastronomic joys – and, let’s face it, the economic sense – of eating souvlaki, this classic dish has never gone out of fashion in Athens’ downtown. The city’s longtime souvlaki venues may have changed little in the last 50 years, but there is something particularly satisfying about their old-fashioned, no-frills approach. With their clientele of seasoned fanatics, the best of the bunch offer a lesson in what it truly means to eat like an Athenian. (Keep in mind that the menus at these old-school souvlaki places have remained virtually unchanged for decades, meaning that there is no chicken served, only the traditional pork or “kebab” – usually made with a mixture of minced veal, lamb and sometimes pork – in variations described in our Athenian souvlaki primer.)

Dear Culinary Backstreets, What and where is safe to eat in Mexico City? We’ve heard horror stories from other travelers about “Montezuma’s Revenge” and would like to avoid getting sick while visiting the city.

Mushroom hunting has an irresistible, magical pull. Composer John Cage, an avid mushroom collector, found them an integral part of his creative process, once writing: “Much can be learned about music by devoting oneself to the mushroom.” Every fall, thousands of Catalans likewise find themselves under the mushroom’s spell, following the elusive fungus’s silent melody into the woods, a rustic wicker basket in one hand and – more and more these days – a GPS-enabled smartphone in the other.

The arrival of fall in Istanbul usually means one thing for us: hamsi season is about to begin. Hamsi, of course, are the minuscule fish (Black Sea anchovies) that Istanbulites are mad about, and the coming of fall and the cooling of the waters of the Black Sea mark the beginning of the best time of the year to eat the little suckers. In honor of hamsi season, we offer a list of six of our favorite places to try these tiny fish.

In the ’90s, as the first American burger and pizza chains began appearing all over Athens, it looked like the humble souvlaki was not the takeaway or delivery option of choice anymore. Luckily, the past 10 years have seen a huge comeback of souvlaki. Neo-souvlaki places that looked nothing like the greasy joints of the past started appearing all over Athens. The economic crisis has made the return of souvlaki even more poignant: people want cheap, tasty food more than ever, and souvlaki shops are opening up everywhere.

The arrival of fall always finds us heading instinctively, like salmon swimming towards their ancestral headwaters, to the Balık Pazarı, Beyoğlu’s historic fish market. Autumn is quince season in Turkey and that means the appearance – for a limited time only – of one of our favorite desserts, ayva tatlısı (literally meaning “quince dessert,” although “quince in syrup” might be more accurate). Nestled in the fish market is Sakarya Tatlıcısı, a pastry and sweets shop with old-world charm that is one of our top stops for this dessert. The apple-like quince is one of those complicated, mysterious fruits that take on a new life when cooked. Raw, quinces are often astringent and inedible.

With a menu from the frigid provinces that border Korea, Dongbei Siji Jiaozi Wang – literally, “The Four Season Dumpling King from the Northeast” – is all about hearty dishes to warm you up from the inside out. The further north you head from the Yangtze River, the more the temperate climate demands that wheat trumps rice as the staple grain, often showing up on menus as dumplings and noodles. Yet despite its eponymous claim to represent China’s Northeast, not even the Dumpling King can escape Shanghai’s astringent influence, specifically in the condiment selection. Here you dunk your boiled dumplings in vinegar and sweet chili pepper rather than the typical Northern garnish that adds soy sauce to the mix (or sometimes boldly goes it alone with no vinegar), occasionally coupled with roughly chopped garlic.

Colibri constitutes something of an Athenian phenomenon: what started out as a small neighborhood pizza and burger takeout place in Mets, next to Athens’ grand First Cemetery, has now evolved into three successful restaurants where people actually queue for more than half an hour to eat homemade pizzas and burgers. The menu is the same in all three places, offering simple comfort food at decent prices.

In a desk drawer at Istanbul Eats HQ is an envelope of leftovers from days when life was less sedentary: Tajik somoni, Kyrgyz som, Cypriot pounds, a wad of Macedonian denar and a small stack of Georgian lari. As with the last bite on the plate, it’s impossible to throw money away, no matter how unstable the currency. But the real value of having it on hand is that it makes a return visit seem likely, even pending. Our plans to return to Georgia were made, cancelled, rescheduled and cancelled again. It would seem our lari would never be much more than a filthy little memento, an IOU from the National Bank of Georgia for a khachapuri that would never be cashed in.

Any Shanghai denizen who has lived in the city for longer than a few months worships at the altar of xiǎolóngbāo (小笼包). These steamed buns of goodness – tiny pork dumplings with a slurp of soup wrapped up in a wonton wrapper – provide delicious fodder for debates among Shanghai’s fiercest foodies.

Viena is the love child of an Austrian ski lodge and a McDonald’s. This Catalan fast-food joint – which has become an obligatory foodie stop thanks to New York Times food writer Mark Bittman, who famously wrote that Viena’s flauta de jamón ibérico was the best sandwich he’d ever had – dishes up fast and delicious grub with a side of kitsch.

We’re especially fond of Istanbul’s vibrant – and sometimes plain wacky – street food scene. Here we present three of our favorite street foods and the best places in the city to get them.

For a Chinese city as fast-paced and increasingly cosmopolitan as Shanghai, there are surprisingly few late-night dining options that don’t involve ordering from the roving, streetside pushcarts that hawk grilled skewers or fried rice and noodles. Unfortunately, these midnight vendors are not always where you want them to be when you need them most, after 10 beers. Enter Ding Te Le.

Hong Kong native and Cha’s owner Charlie Lau became a restaurateur because of a hankering. A movie producer by day, Lau came to Shanghai with Ang Lee to film “Lust/Caution,” and was disappointed that Shanghai lacked a proper Hong Kongese cha canting, a casual all-day eatery that serves traditional Cantonese food alongside milk teas and coffee. So he decided to open his own. On the set of “Lust,” a 1930s period piece, Lau was responsible for ensuring the historical accuracy of the costumes, casting and set design, so it’s not surprising that he designed Cha’s with the past in mind. Walking across the restaurant’s threshold transports you to 1950s Hong Kong.

[Editor's note: We're sorry to report that A Da Cong You Bing has closed.] In China, where queuing isn’t part of the culture, a long line of hungry diners patiently waiting for their food is just about the highest compliment a restaurant can receive. By those standards, Mr. Wu’s scallion oil pancakes are, hands down, one of the most sought-after breakfast treats in Shanghai. The line that stretches out his kitchen’s back door and wraps around the street corner means that fans of his savory pancakes can wait for hours, gulping in the scallion-scented air as they look forward to their chance to sink their teeth into the real thing. Scallion oil pancakes (葱油饼, cōngyóubǐng) are a common breakfast treat in Shanghai, but when Mr. Wu makes them, the little savory rounds stuffed with salty pork and scallions become an art form.