In Barcelona, Valentine’s Day is no big deal. On the other hand, on April 23, you had better remember to buy a flower for your sweetheart. La Diada de Sant Jordi is one of the most important holidays in Catalonia, honoring its patron Saint George. The Catalan tradition – inspired by the legend of Saint George’s chivalrous slaying of a dragon to save a princess – is for men to buy roses for women and, in return, for women to buy books for men.

Considering Athens’ position as a top tourist destination, it may come as a surprise that it is only recently that local museums have decided to up their game when it comes to their dining offerings. Worldwide, a good restaurant and café are now considered part of the whole museum-going experience, but it took a little time for Athenian museums to catch on to that, though catch on they have.

On the diner intimidation scale, Shanghai’s Chenghuang Miao Tese Xiaochi – which can be loosely translated as “City God Temple Snack Shop” – ranks pretty high, with aggressive lunchtime crowds and nothing but Chinese character-laden menus for guidance. But the payoff, a baptism by fire in authentic Chinese eating, is worth it. The hungry masses that congregate here have discovered a simple truth: the food here is quick, tasty and cheap – a gastronaut’s holy trinity.

Dear Culinary Backstreets, We will be visiting Barcelona with our children. Do you have any good recommendations of places in the city to eat with kids?

Lahmacun is one of those mysterious foods where a lot is created with so little. It checks all of the boxes of a perfect savory snack: crispy, oven-fired crust, light and spicy meat spread, a fresh green garnish and a tangy spray from a lemon. It’s like an artisanal pizza with a Middle Eastern topping wrapped around a side salad – for the cost of a shoeshine.

Dear Culinary Backstreets, I’m traveling to Barcelona and I love visiting food markets. I’ve heard a lot about La Boquería, but are there any other markets that might be worth visiting?

One of the big downsides to Istanbul’s otherwise great food scene is the lack of a credible Mexican option. We’re not asking for anything special, just a place that serves simple, tasty tacos or burritos. But when the craving for Mexican gets strong, we don’t despair; we just head down to the waterside neighborhood of Karaköy, home to Beşaltı Kirvem Tantuni, a hole-in-the-wall (literally) spot whose food and atmosphere remind us of the tiny taquerías in Mexico and the United States that we miss so much.

Dear Culinary Backstreets, In just about every restaurant or bar I’ve been to in Barcelona, I’ve seen a dish called “tortilla.” What exactly is a tortilla and can you recommend any places where they are done especially well? Although it would seem that much of the world imagines the inhabitants of Spain subsisting largely on paella, the truth of the matter is that it is the tortilla española, also known as tortilla de patatas (truita de patata in Catalan), that  really holds the place of honor in the hearts and stomachs of Spaniards. Often translated into English on menus as “potato omelet,” this hearty round cake of potatoes, eggs, olive oil and salt has nothing to do with the traditional French omelet, nor does it have anything in common with a Mexican tortilla. At its most basic, the Spanish tortilla is made by frying up a thick mass of sliced potatoes and eggs in olive oil and then slicing it into savory wedges.

Markets in Mexico City are as integral a part of the culture as mariachi music and tacos, providing a place for neighbors to come together for shopping, gossip and family outings and playing a key role in keeping the social fabric tightly woven. While most neighborhoods have their own brick-and-mortar locations, their street markets are far more colorful. These crowded, boisterous shopping areas – some so large that their colorful tarp roofs can been seen on satellite photographs, stretching for miles – are also an essential component of the city’s culinary scene.

To qualify as a Chinese Time-Honored Brand (老字号, lǎozìhào), shops must prove that they’ve been a profitable business since 1956. Only about 1,000 brands across the country have achieved this honor, an impressive number considering the tumult of the last 60 years in China and the damage to hundreds of historical national treasures. Among these government-endorsed venues is Da Hu Chun (大壶春), one of Shanghai’s oldest fried pork bun shops, which first opened in the 1930s, less than a decade after its specialty dish, shēngjiān mántou (生煎馒头), was created.

In Mexico, sandwiches generally come in the form of the torta, usually made out of a white bread roll known as a bolillo that has been sliced in half and then filled to the brim with meat, avocado, tomato, onion and sliced jalapeño peppers. In Mexico City’s San Rafael neighborhood, however, a family-owned sandwich shop called La Vaca de Muchos Colores is doing its best to expand the city’s sandwich scene.

It is hard to identify exactly when the forgotten neck of Istanbul between Etiler and Arnavutköy became prime real estate. Not so long ago, overgrown green space alongside the road was interrupted by the occasional car wash and low-slung shanty; it was not so much a place as a road to other places. But now it seems this road is going places of its own. A private tennis club with a swimming pool shares a parking lot with Backyard, a café and restaurant with a big grassy yard filled with lounging parents and children wallowing in that rare Istanbul commodity: grass.

Earlier in 2012, Jing’an Villas – a square, block-sized 1930s-era housing area in the heart of downtown Shanghai – survived an ironic plan that called for permanently relocating all of its 3,000-plus residents in order to better “preserve” the historic neighborhood. Luckily, the plan was shot down in a party committee meeting. For now, at least, Jing’an Villas remains the perfect setting for trying longtang cai, simple, home-style alleyway food that features local favorites.

The large banner in La Nena chocolatería proclaiming “No Hay Alcohol” (strung up between a rocking horse and a wooden toy kitchen) makes it fairly clear that this is not a place for sophisticated conversation and cocktails. That doesn’t mean that La Nena (which means “The Girl” in Catalan) doesn’t cater to any other vices. Indeed, its delicious homemade cakes, pastries, hot chocolates and savory snacks tempt the residents of Barcelona’s Gràcia neighborhood on a daily basis.

Confucius once said, “The superior man is modest in his speech, but exceeds in his actions.” He clearly never met a food writer, because superlatives and immodest speech are basically all we have to work with. But had Confucius opened a small patisserie, it would probably be Lillian Cake Shop.