Churros, the long, skinny, crenellated, sweet fried crullers made from just flour, water and salt, have been enjoyed for centuries in Spain, with hot chocolate and without. However, in Barcelona, xurros, as they are called in Catalan, are becoming an endangered species. In recent years, more than half of the xurrerias in the city have disappeared. Many of the old-timer xurreros who still survive have the odds stacked against them: permit renewal for a street stall is near impossible; rent has become prohibitively expensive and continues to increase; or required updates to old infrastructure might prove extremely costly. However, we know of one young newcomer who has emerged with fresh energy and inspiration, incorporating lessons from the masters in his creative take on xurros. The best way to save this endangered species is to eat it, so here are our five favorite xurrerias, which make these star-shaped doughnuts with great care – and with delicious results that are worth seeking out.

Editor's note: For our last stop on CB's Global Bar Crawl this week, we're pulling up a stool at our favorite mezcal bars in Mexico City, kicking back and savoring every last drop. Para todo mal, mezcal. Para todo bien, también. Y si no tiene remedio, tómate litro y medio. For everything bad, mezcal. For everything good, the same. And if that doesn’t help, drink a liter and a half. – Popular saying among mezcal lovers.

Editor's note: Our third installment in the Global Bar Crawl takes us to Barcelona, where gin continues to be the drink of choice among locals. Tomorrow we head to a spot in Istanbul where you can spend an evening visiting a number of bars, all without leaving the building. Spain is a country that loves a long-drink – alcohol in combination with a soft drink, refreshing and open to invention and reinvention. On the heels of creative gastronomy’s efflorescence in recent years, many old drinks, cuisines and forgotten ingredients have returned, revived through new and more sophisticated techniques and interpretations. The gin and tonic, called gintonic here, is one such Spanish obsession, and all that ingenuity and focus have gone into taking this highball to the next level.

Morro Fi and Mitja Vida are two relatively new entrants to Barcelona’s vermuteo (“vermouthing”) culture, whose history stretches back to the turn of the last century. These two bars are the product of nostalgia for a bygone era fused with the social network- and urban design-driven present. The vermouth tradition in Barcelona was started in the early 20th century by Flaminio Mezzalama, who represented the Italian company Martini & Rossi in Spain, at his fabulous modernist Bar Torino. Vermut began to be produced in Catalonia, and in the following decades, the province developed its own style of the aromatic fortified drink. At the same time, the custom arose of having vermut before lunch with some pickles to whet one’s appetite. That tradition faded over time but has emerged in recent years as a kind of retro, hipster-approved pastime.

Editor’s note: This post is the fourth installment of “Best Bites of 2013,” a roundup of our top culinary experiences over the last year. Stay tuned for “Best Bites” from all of the cities Culinary Backstreets covers. Hilaria Gastrobar We visited this restaurant on revitalized Madero Street downtown just a few months after it opened, and we were immediately won over by the food and beer selection.

Editor’s note: This post is the third installment of “Best Bites of 2013,” a roundup of our top culinary experiences over the last year. Stay tuned for “Best Bites” from all of the cities Culinary Backstreets covers. Bar do Adão There are so many good fillings – 65, in fact – for the pastéis, or fried turnovers, at Bar do Adão that we appreciate their diminutive size, which allows us to eat a greater variety in one sitting.

When we think of white wine in Catalonia, we think of its seemingly endless possibilities. Production of whites here has a 2,000-year-old history. The wide-ranging diversity in the area’s Mediterranean climate and calcareous soils, from the mountains to the sea, and the combination of old grape varieties and newly introduced “foreigners” with traditional and experimental methods of production make for innumerable styles and no taboos. Who knew white was a color with so many variations? The traditional Catalan grape varieties used to make white wine are mainly macabeo, xarel-lo, parellada and garnatxa blanca, but this area of Spain has the largest number of white grapes included in all its protected appellations (D.O.). Where other Spanish D.O.s usually are deeply defined by one or a few varieties, in the Catalunya D.O. there are more than 16 allowed – 35 counting the reds. In fact, this umbrella appellation, which covers wines that do not fall under the 10 subregion designations (Montsant, Penedès, etc.), was created to allow the use of all the grapes of the other Catalan designations in the entire area. It implicitly gives freedom to Catalan winemakers to express more than the old narrower conceptions of terroir and opens the doors to experimentation.

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.

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.

Dimitris Kotsaris was more proselytizer than baker. Rather than a flour-dusted apron, this mild-mannered gentleman would wear elegant suits to meet with journalists, bearing two or three kilos of his famous whole-wheat bread as a gift. He was an ardent believer in the medicinal qualities of bread and preached widely that good bread promoted good health, once even taking his case to Harvard, where he delivered a talk about the role of well-made loaves in healthy diets. In 1981 Kotsaris opened Pnyka, the pulpit from which he spread his yeasty gospel, and gave the bakery the Greek name for the hill downtown where, in the golden years of Ancient Greece, Athenians gathered for the general assemblies that played such a formative part in the creation of democracy. It is quite fitting then that the first Pnyka shop opened in Syntagma (“Constitution”) Square. The bakery has since added two more shops in the city, in Exarchia and in Pagrati, the headquarters of the operation, and its following is such that last year a third was established in Vienna. Kotsaris passed away last year but his vision lives on through his son George, who has taken over the business.

Most people who visit Barcelona are sure to spend at least some time at one of the city’s beaches. Yet few are aware that when seeking respite from the bustling urban streets, heading up into the forested hills above the city can be just as pleasant. Vallvidrera, a village at the entrance to Collserola National Park that offers gorgeous views of the surrounding forests and the city below, is just the place for such an excursion. Starting in the early 19th century and up until the 1980s, Vallvidrera served as a vacation destination for wealthy Barcelonans who wanted to escape the summertime heat of the city. The abundance of mansions here, many built in the Modernist style, is a testament to this bygone era. Nowadays, although Vallvidrera is a year-round community that is technically part of Barcelona proper, it’s still a destination for local urbanites and their families wanting to get out of the city and relax, particularly on weekends.

With the brutally forceful clearing of Gezi Park of its temporary inhabitants by Turkish police, the recent protests in Istanbul have lost the imposing physical presence that, incredibly, lasted for two weeks. These days, protestors are tossing ideas onto social media walls to see what might stick. To keep the resistance alive, we’ve been urged, via Facebook, to take part in all sorts of acts, passive and active, madcap and practical. But the one that really struck a chord with us is a campaign not to spend any money in shopping malls, not to even enter shopping malls, and to spend only what we must at small, local shops. Boycott the mall? Now, that’s a battle we’ve been waging since the late 1980s.

We generally prefer to keep our nose in a bowl of soup and out of the political arena, but over the weekend, Istanbul’s politics seeped through the cracks in our windows, in the form of teargas and general mayhem. As longtime foreign residents of Istanbul, we’ve found it relatively easy to steer clear of political activity, but every so often it barges into our homes and turns our stomachs.

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.

Editor’s note: This feature from Mexico City is the second installment in our street food series this week, highlighting the best streetside eats in each of the cities Culinary Backstreets covers. 1: Pambazos The pambazo is a Mexican sandwich that’s similar in style to the more familiar torta, but not nearly as ubiquitous. Most commonly found at weekly street markets like Sullivan, pambazos are made with hard, white bread rolls soaked in guajillo chili sauce that softens the crust and gives it a warm, orange-red hue. Once dried, the bread is sliced in half and then filled with a generous portion of diced potatoes, chorizo, lettuce, sour cream and sprinkled queso fresco. The bread is quite fragile, so eating the concoction can be somewhat challenging. From the first bite the pambazo starts to disintegrate, and by the end we’re usually scooping up the heavy mess with our fingers. It’s all worth it, though, as the light hint of chili in the bread and the hearty ingredients inside give the dish the same satisfying and belly-filling pleasure that comes with a good bowl of thick stew.