It’s been two weeks of cycling through China’s Qinghai province, and the food selection is slim. The majority of the province sits on the vast Tibetan Plateau, well above the tree line in conditions too harsh for significant cultivation. Yaks graze on well-trampled grass as far as the eye can see, with white yurts and colorful prayer flags dotting the hillsides and each summit pass. By Chinese standards, six million inhabitants in the country’s fourth-largest province make Qinghai practically deserted. For long stretches, only nomadic yak herders can be spotted between the tiny villages. Stopping for a roadside lunch in the small, isolated towns inevitably means a bowl of either mutton or yak chopped-noodle soup (羊肉面片, yángròu miàn piàn or 毛牛肉面片, máo niúròu miàn piàn). Served up in a tomato-chili broth, it’s a tasty meal, but repeated daily, it inevitably becomes tiresome. Additional ingredients sometimes includes julienned zucchini or green peppers, depending on the remoteness of the particular town and their staggered vegetable shipments. After just one week, we’re eagerly awaiting more fruitful pastures, and Sichuan province, located just to the east on our route, is a culinary paradise.

It’s a long drive from Athens to Perama, the westernmost terminal of the port town of Piraeus, and the payoff is, at first sight, minimal. To the left is the port’s industrial zone – a forest of blue and orange cranes that tower over the sea. To the right is a stretch of industrial wasteland: old electricity plants, derelict factories, walls with enormous graffiti celebrating Piraeus’s very successful team, Olympiacos, and then a jumble of recently built high-rise buildings on a rocky hill. First populated in the 1920s by immigrants from Asia Minor, Istanbul and the Pontus (Black Sea) region, this suburb of Piraeus now has about 25,000 residents, most of whose livelihoods depend on the dockyards that have been here since the 1930s. Perama remains a proud, working-class neighborhood, and it is no accident that the early Greek hip-hop of the ’90s and the so-called Low Bap hip-hop genre and movement started here.

Piraeus holds the distinction of being Greece’s biggest port, as well as the largest passenger port in Europe. Although it is a mere 20-minute train ride from downtown Athens, most Athenians think of Piraeus with a reverence reserved for a foreign country. There is just something almost mythic about this ancient port, which has been in existence since the 5th century B.C. – the famous opening line of Plato’s Republic is, after all, “I went down to the Piraeus yesterday.” In the modern period, the greater Piraeus area – home to a population of about half a million in Piraeus proper, along with a number of suburbs – has witnessed dizzying highs and lows, especially over the past century. The area has been a major destination for immigrants from elsewhere in Greece, including the islands and the Peloponnese. One of the biggest population expansions came after 1922, when vast numbers of Greek refugees fleeing Asia Minor (modern-day Turkey) migrated to the area and established new working-class neighborhoods, including Nikaia, Keratsini, Drapetsona and Korydallos.

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.

It’s not every day that you find a former national volleyball champ in the kitchen, but that’s just the case with Lu Dajie (aka “Big Sister” Lu) and her eponymous restaurants. After a successful career with the Chinese military’s volleyball team, followed by years working in restaurants for others, she left her hometown of Jianyang in Sichuan province with her brother, bringing her region’s famous cuisine with her. Now, in Shanghai, she is slowly building an empire.

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.

Once a mostly beer-free country, Spain – traditionally a land of wine drinkers – has recently started to develop a taste for the sudsy beverage, and Catalonians seem to have been the main pioneers behind this growing trend. The number of local craft breweries is increasing and so is the number of beer fans, who are also learning how to brew the drink at home. Put it all together and you have a young and adventurous market that is ready to experiment with tastes and textures to create stellar new beers with a distinct Mediterranean flavor.

The economic crisis that has plagued Greece for the past five years has led to changes on the Athenian culinary scene, including the opening of three new types of venues that seem to be reflective of the times. The first two – cupcake places and frozen yogurt shops – are imports from abroad, perhaps indicative of a population in need of something sweet, comforting and affordable. On the other hand, the third trend, wine bars, digs deep into Greece’s roots, representing a fascinating phenomenon in a country that is one of the world’s oldest wine-producing regions. In antiquity Greek wine was exported across the Mediterranean, and the winemaking tradition has remained strong through the millennia. Yet although there are numerous wineries around the country, in the modern era Greek wine has never achieved the place it deserves on the international market. Production levels are low and vintners have long been unsure of how to market abroad.

Good service in China is a relative term, and the longer you live here, the lower your expectations sink. The Michelin Guide allegedly won’t deign to cross over the Hong Kong border into China because they refuse to sully their white-tablecloth reputation by doling out stars to restaurants with subpar service. But the inspectors must have never entered a Hai Di Lao Hot Pot, or they might have to change their tune.

Dear Culinary Backstreets, Both my husband and I are vegetarian and we are planning a trip to Athens. We’ve heard that Athens doesn’t have a lot of choices for vegetarians and are a bit worried. Will it be possible for us to eat some of that lovely Greek food? What kind of traditional vegetarian dishes would you suggest we try?