The article features a massive display of precise, often humorous, expressions that could be useful for C1 students (and above) trying to expand their vocabulary on the topics "cities, food and tourism", for example: a [surprising tapas] scene, a mighty [baroque church], an under-the-radar [weekend], to loom over [the River Ebro], to go unnoticed, an [architectural] powerhouse, a stronghold, the formidable [Basilica del Pilar], ochre, a dome, to cast [a glow], to glint, the brickwork, to echo, to put to shame, overhyped [Barcelona], cramped, a maze, a local, to jostle, to ooze, garlicky [gambas], to swell, a [flower] offering, the faint-hearted, unvarnished, at a glance, to blend, meandering [cobbled streets], to heave, [party] ephemera, to soak, laid-back, a show-stopper, flanked, backlit, blessed, carved [ceilings], mini-me, Moorish, compelling, a glimpse, layered, granted, an alley, oil-spitting, crowned, parsley, pie, mash, to top, overlooked, a chapel, a soaring [needle], brutalist, beguiling, the draw, to stud, a fruit gum, to flood, a beam, a crib, to grab, the foundations, [to be] tucked, meaty, a gyoza, lacquered, packed, boisterous, a clan, at the helm, wisecrack, to spill [on], a [modern] spin, camp, bric-a-[chic], tiered, car-boot, brasserie, to be lined, vintage, crackly, wholesome [plates], finesse, a cast, to stare at [you], a haunt, starchy, a [gastro-]hub, a bite, [no] frills [low bills], overkill, varnished, unflashy, wallet-friendly, [accommodation] bang, an olive's throw, to sample, sleek, respite, the [urban] sprawl, up to scratch, deftly, to put the world to rights, to haunt, crash pad, [to strew, strewed], strewn, to plunder, goose-bump, to shimmer, to catch up with, a fleet, a jumping off point, a foodie [city].
EXAM WARNING: do not try to memorize the most difficult expressions to force them into your monologue in the oral exam, it usually sounds unnatural or just wrong (this article is a written text, people do not talk like that!). Learning vocabulary is a slow process that takes time, involves reading extensively and requires forgetting new words a few times, before they finally get fixed in your active memory. What you can do, perhaps, is to find one or two expressions or collocations that you are already familiar with, but you do not normally use, and improve the precision and richness of your expression in a gentle manner. My favourite expression in the long list of vocabulary above is "to put the world to rights" but I am not sure it will be very useful in an oral exam.