If Mexico City's Bósforo is the capital's shrine, In Situ is Oaxaca's cathedral. On a quiet stretch of Morelos in the Oaxacan centre, a tiny two-level room lined floor to ceiling with mezcal has become the reference point for anyone serious about the spirit. It is run by Ulises Torrentera, a writer and self-described mezcólogo whose book on mezcal is one of the foundational texts on the subject, and it holds what its founders describe as the largest collection of traditional mezcal in Mexico. The World's 50 Best put it about as plainly as a review can: it is not possible for a bar to be more dedicated to a spirit than In Situ is to mezcal.
That single-mindedness is why it sits at number two on our list of the best mezcal bars in the world, and why for many drinkers it is the most important stop on any Oaxaca trip. Oaxaca is the heartland of mezcal, and In Situ is where the heartland concentrates itself into six bar stools and a wall of bottles.
The place: small, serious, and lined with bottles
In Situ is at Avenida José María Morelos 511, in the Centro of Oaxaca de Juárez, a short walk from the city's main tourist core. Be careful with stray online listings; a few show a different street, but every reliable source and the bar's own materials point to Morelos 511. It is small, with something like thirty seats spread across two levels, but as the writer Michael Snyder observed in a much-cited PUNCH feature, the only seats that really count are the six stools at the yard-long bar. That is where the guided tasting happens, and it is worth arriving early to claim one.
The room itself is pared back and unadorned. One wall runs floor to ceiling with mezcal bottles, each with a small paper tag hanging from its neck naming the maguey inside. There are bowls of mandarins and jars of pepitas on the bar, and sometimes a few botanas like Etla cheese or flor de maguey in escabeche, but there is no salt-and-orange theatre and no garnish culture. This is a purist, education-first space. It closes at eleven, on the dot, at which point the mezcal faithful tend to drift next door to the later-night Archivo Maguey to keep going.
Ulises Torrentera, the mezcólogo
You cannot separate In Situ from the man behind it. Ulises Torrentera is an Oaxaca-born writer widely regarded as one of the foremost authorities on mezcal culture, a man who studies the spirit from its history and mythology through to its production. His book, Mezcalaria: Cultura del Mezcal, first published in 2000, is the seminal work synthesising the scholarly, historical and ethnobotanical story of agave, pulque and mezcal; a later 2012 edition was the first to appear bilingually in English and Spanish. He has written several other titles on the subject besides.
Torrentera is, by reputation, a purist and something of a provocateur. He argues that mezcal is best appreciated blanco and unaged, at its natural strength of forty-five to fifty percent, and he has famously described cocktails as the fanciest way to degrade mezcal. He champions small campesino producers and their palenques, and he has been openly critical of the homogenisation and over-regulation he sees creeping into the category. In Situ is the physical expression of that worldview: no industrial brands, no dilution of the idea, just the traditional spirit explained with genuine scholarship. His partner Sandra Ortiz Brena, who published his book and is consistently named as co-owner, has long been part of the operation. In one memorable line captured by PUNCH, asked about a bottle whose agave was hard to pin down, she said simply that maguey is a promiscuous plant.
A note of honesty, in keeping with how we work: In Situ is confirmed operating in 2026, and Torrentera remains its named curator, but we could not independently confirm that he still personally pours behind the bar every night. What is certain is that the bar remains his project and reflects his philosophy in every detail.
The collection, and the cards
The heart of In Situ is its collection. The World's 50 Best notes that the walls hold what the founders claim to be the largest collection of the spirit in Mexico. We would treat that as a founders' claim rather than an audited fact, but the numbers are still remarkable. The bar opened with around sixty bottles; by 2018 first-hand reports counted more than one hundred and eighty, and it has continued to grow. Torrentera works with somewhere between fifty and sixty producers from around the state, which is the real engine of the place. This is not a bar buying from importers; it is a bar with direct relationships to scores of maestros mezcaleros.
The signature touch, and the thing every visitor remembers, is the card. Each pour arrives with a printed identification card carrying a picture of the agave, tasting notes, and the details of the plant's type, region and age along with the production method. The cards are in Spanish and the staff will translate, and the effect is almost ritualistic. You are not just handed a drink; you are handed the story of that drink, so that by the end of a flight you have learned to connect what is in the glass to a specific agave, a specific village and a specific way of making.
How a tasting works
The format is a flight of three. Rather than hand you a menu and leave you to guess, the staff ask about your level of experience and the flavours, regions or agave varieties you gravitate toward, then customise the selection for you. Each glass is explained and set down with its card. The best way to approach it, as regulars and reviewers agree, is to describe what you like and then surrender to the recommendation, letting them pour you the bottle you never knew you wanted.
The list leans overwhelmingly toward unbranded, traditional mezcals from small and often uncertified producers, many of them made from wild silvestre agaves rather than cultivated espadín. Early tasting notes from the bar mention magueys like verde, coyote, madrecuixe and barril, along with ensembles that blend several agaves in one distillation. Because these are tiny batches, the specific bottles rotate, so we will not promise you a particular rarity on a given night. What we will promise is range: this is one of the very few rooms on earth where you can taste that far across the agave spectrum in a single sitting.
A short course in mezcal, Oaxaca style
To understand why In Situ matters, it helps to understand Oaxaca's place in the story. Oaxaca produces the large majority of Mexico's mezcal and, as PUNCH put it, remains the only place on earth where you can easily taste mezcal in anything approaching its true depth and diversity. Within the state, the town of Santiago Matatlán bills itself as the world capital of mezcal, its name derived from the Nahuatl for the place of nets.
Mezcal is any agave distillate; tequila is technically a mezcal made only from blue Weber agave. Of the many agave species in Mexico, roughly forty are used for distilling. Espadín, Agave angustifolia, is the cultivated workhorse that takes around seven years to mature and underpins most production. The prized wild and semi-wild varieties, which take far longer and yield far less, include tobalá, tepextate, madrecuishe and arroqueño, and it is these that give a great collection its peaks. Mexican rules define three production tiers under the NOM-070 standard: plain Mezcal, where industrial methods like autoclaves and column stills are permitted; Mezcal Artesanal, which requires pit or masonry-oven roasting and clay or copper pot distillation; and Mezcal Ancestral, the most restrictive, which mandates pre-industrial methods and distillation in clay pots. The Denomination of Origin protects the word mezcal geographically across a group of Mexican states, with Oaxaca as its unquestioned centre. In Situ pours from the artisanal and ancestral end almost exclusively, which is precisely the point.
The recognition
In Situ has drawn some of the most emphatic praise in the mezcal world. The World's 50 Best lists it and calls it a bar that could not be more dedicated to its spirit. Mezcalistas wrote that if there were a mezcal heaven, it would be In Situ, and described Torrentera and Ortiz Brena as perhaps the two foremost experts on mezcal. The Spanish-language outlet Mezcología simply dubbed it the cathedral of mezcal. PUNCH built an entire Oaxaca drinking itinerary around it, slotting it as the marquee evening stop. That kind of consensus, from the people who know the category best, is rare.
How to visit
A few practical notes. Go in the early evening and aim for one of the six bar stools, because that is where the full guided experience happens. It is a walk-in; there is no formal reservation system, and the room is tiny, so seating is first come. Come to learn rather than to party, and do not ask for salt and orange, because they do not do garnishes here. Order a customised flight and be honest about your palate, whether you are a beginner or a veteran, so the staff can pitch the pours correctly. The mezcals are strong, often forty-five percent and up, so pace yourself and drink water alongside. When the bar closes at eleven, Archivo Maguey next door is the natural continuation. And if you fall for something, you can usually buy a bottle, a T-shirt, or one of Torrentera's books on the way out.
Part of a larger Oaxaca circuit
A visit to In Situ pairs naturally with the rest of Oaxaca's mezcal scene, and many drinkers build a whole evening or a whole trip around it. A common and rewarding sequence is to start with a structured, appointment-only tasting at Mezcaloteca to learn the framework, move on to Cuish for its bohemian energy and producer-owned bottles, and finish at In Situ's six-stool bar with a customised flight that puts everything you have learned into practice. The staff switch easily between Spanish and English, so language is rarely a barrier, and because every pour comes with its printed card, you leave with a written record of what you drank and why it tasted the way it did. Few cities on earth let you taste this deeply into a single spirit across one short walk, and In Situ is the summit of that walk.
Frequently asked questions
Where is In Situ? At Avenida José María Morelos 511, in the Centro of Oaxaca de Juárez, a short walk from the city's main tourist core. Ignore stray listings showing a different street; Morelos 511 is correct.
Do I need a reservation? No. In Situ is a walk-in bar. It is very small, though, with only six stools that really matter at the bar itself, so arriving in the early evening gives you the best chance of the full guided experience.
Who is Ulises Torrentera? An Oaxaca-born writer and self-described mezcólogo, author of the seminal book Mezcalaria: Cultura del Mezcal, and one of the most respected authorities on mezcal culture. In Situ is his project, run with his partner Sandra Ortiz Brena.
How does a tasting work? You take a flight of three. The staff ask about your experience and the flavours or regions you like, then customise the pours, explaining each glass and handing you a printed card with the agave, region, age and production method.
Should I ask for salt and orange? No. In Situ is a purist, education-first room and does not do garnishes. Come to taste the mezcal on its own terms, and pace yourself, because the pours are strong.
When is it open? Roughly Monday to Saturday, from the early afternoon until it closes at eleven, on the dot. When it shuts, the mezcal faithful often continue next door at Archivo Maguey. Confirm hours before a special trip.
The verdict
In Situ is not the flashiest bar on our list, and it is not trying to be. It is a small, serious room in the heartland of the spirit, run by the person who quite literally wrote the book, holding one of the deepest traditional collections anywhere, and it teaches you as it pours. For a drinker who wants to genuinely understand mezcal rather than merely enjoy it, there is no better place to sit down. It is the cathedral, and it belongs near the very top of any honest ranking of the world's mezcal bars.