The Chinese have appreciated the finer qualities of roast duck for millennia, and in that time, they’ve refined their cooking techniques into a virtual art form. The first mention of roast duck (烤鸭, kǎoyā) dates back to the Northern and Southern dynasties (A.D. 420–589). By the Yuan Dynasty (1206-1368), the tawny bird was gracing the tables of mandarins and emperors in then-capital Nanjing, and imperial kitchen inspector Hu Sihui mentioned it in The Complete Recipes for Dishes and Beverages, published in 1330, along with a record of how the duck was cooked.

For too long retsina has been thought of as a cheap, oxidized, overly pungent bad wine made from mediocre grapes, its poor quality disguised by an overdose of resin and exacerbated by being stored in questionable conditions in the backyards of seaside tavernas. To say the wine has an image problem is an understatement – but that may be changing. Regardless of its reputation, retsina is a true Greek original. It dates back to the Ancient Greeks, who would coat the interiors of their otherwise porous earthenware amphorae with resin to make their wine storage airtight. Wine drinkers grew to like the taste, and winemakers consequently began adding pine resin to grape must during fermentation.

Dear Culinary Backstreets, My family is planning a trip to Shanghai. We want to dine like the locals but also make sure our little ones get their fill. Do you have any recommendations?

At the dusty eastern edge of the Taklamakan Desert, the ancient city of Dunhuang marked the intersection of the northern and southern parts of the Silk Road. Meaning “Bright Beacon,” Dunhuang was a historical refuge for weary travelers peddling their wares along the trade route, and this confluence of cultures influenced the ancient city’s cuisine. Merchants brought spices and cooking techniques from the West that combined with Chinese imperial culinary traditions and local ingredients.

Legend has it that in 12th-century Priorat, in the region of Tarragona in southern Catalonia, there was a shepherd who dreamt every night of a ladder leaning against a pine tree. The ladder ascended from the valley all the way to heaven and angels climbed up and down, tending to their heavenly and earthly duties. Some Cistercian monks, upon hearing this story, took the vision as a divine message to build the monastery Scala Dei (“Ladder of God”) in that very spot. Those clever monks, noting the angels’ comings and goings, decided to become their wine suppliers and began cultivating grapes and making wine there.

[Editor's note: We're sorry to report that La Biblioteca Gourmande has closed.] In the heart of El Raval, one of Barcelona’s most multicultural neighborhoods, lies a portal to the Catalan countryside. At La Biblioteca, which opened in 2012, the origins of the ingredients sing out clearly from each dish and plunge you into a pure culinary experience inspired by the land: the traditional farmhouses called masias, the rustic recipes of the Pyrenees, the perfume of the valleys and gardens, the modern farmers near the city and the influence on plants and herbs of the Mediterranean Sea.

The vast country of China has just one time zone, so Shanghai’s East Coast location means darkness comes early and most residents usually eat by nightfall, with restaurants often closing their kitchens around 9 p.m. But for those who keep late hours, nighttime brings out a chorus of pushcart woks and mini grill stands to street corners around the city. Despite often aggressive government crackdowns on these tasty, yet mostly unlicensed, food stands, the migrants who run them are determined to make a living and feed the masses while they’re at it. Our top five list goes beyond these roving vendors to feature a mix of restaurants that stay open late and small family-run gems that cater exclusively to the night-owl crowd.

In Mexican cuisine, sweets are for the most part simple treats that are enjoyed at the park, market or beach, such as caramelized fruits and vegetables, blocks of nuts or amaranth seeds held together with honey, or small rice paper cakes filled with honey. The common denominator of most of these sweets is their simplicity. When it comes to ice cream and other frozen delights, however, the country truly shines, with an astounding variety of cold treats to please sweet tooths of every persuasion.

Editor’s note: While the fate of the Gezi Park occupation is being hotly discussed, we’ve been spending our time sipping deeper into Turkey’s other great debate: what is the country’s national drink? In the spirit of national reconciliation, here is our report. The recent protests that raged across Turkey may have been sparked by the government’s ham-fisted efforts to bulldoze a precious stand of trees in Istanbul’s Gezi Park, but the country’s eaters and drinkers had already gotten a taste of Ankara’s increasingly meddlesome overreach during the weeks and months before.

Dear Culinary Backstreets, Where can I go in Barcelona when I'm tired of sightseeing and I just want to sit down and relax with a cup of coffee? Visiting museums and landmarks can be a lot of fun when you're a tourist but sometimes you can learn more about the life of a city by sitting in a chair in a café than you can by reading any guidebook. In Barcelona, there's no shortage of cafés but like anywhere else, it can sometimes be a bit tricky to find one that has just the right ambiance.

Editor’s note: This post wraps up our special series this week featuring our top street food picks in all of the Culinary Backstreets cities. As rapidly as Istanbul marches toward its modern destiny, street food in this city is still served the old-fashioned way, by boisterous ustas with a good pitch and, sometimes, a really good product.

Editor’s note: This is the fourth installment in our street food series this week, featuring dispatches on the best streetside eating in all the cities Culinary Backstreets covers. Before we get down to the business of discussing the best of Athens’ street food, a disclaimer: Athens is at a disadvantage when it comes to streetside eats. For one thing, a lot of venues – souvlaki joints, pizza parlors and even offal soup places – are open all night or even 24/7; they are just not serving on the street, though.

Dear Culinary Backstreets, My husband and I are planning a visit to Istanbul with two little ones in tow. We love to be adventurous with food and want to explore the city’s culinary scene, but are also a bit concerned about finding “child-friendly” places to eat. Do you have any recommendations?

Forget about Christmas. In Greece, Easter is the main event, one where food, naturally, plays a starring role. It is also very much a holiday celebrated in the countryside: most Athenians go back to their villages during the holiday to be with their extended family and enjoy the Easter-related culinary delights of their home region.

The idea behind the “Migrant Kitchen” lunch series, first organized in Istanbul this fall by Istanbul Eats and Culinary Backstreets, is simple: get locals to sample the food of some of the immigrant communities living in their city and, through that experience, to learn more about those often invisible communities. In Istanbul, the series gave locals a taste of some fantastic Cameroonian, Liberian and Ethiopian delicacies.