I came to Santiago (Chile) packing a 2017 New York Times article entitled “36 Hours in Santiago.” Steve and I actually had more than 50 hours in the Chilean capital, so I never intended to follow the Times itinerary to the letter. Still I like the 36- (or often 48- or 72-hours) in Wherever format; it suggests sightseeing highlights and often gives me ideas for where to eat. I borrowed the format last fall when I blogged about our 31 hours in Seoul, a stopover during which I concluded that Seoul deserves to be included on any list of the great cities on the planet. Fifty hours in Chile’s biggest city made me think Santiago doesn’t. But it also reminded me that any attempt to make snap judgments about a brief stop anywhere is fraught with peril.

Our first 24 hours in Santiago started off uncomfortably and then went downhill. I felt elated when our Avianca flight from Mexico City arrived about 8:20 pm Sunday — a bit early. But then we had to spend 40 minutes in line to get a simple entry stamp in our passports. We felt happy again to find our bags (which we checked, due to their weight) waiting for us on a moving carousel. After collecting them, we made our way through a gauntlet of some of the most aggressive taxi drivers I’ve confronted anywhere. I had studied up on the best way to take an Uber from the airport into the city, a move reported to be difficult because the taxi drivers hate the Uberfolk so much they sometimes physically attack them. I’d found (and photocopied) one detailed blog post that counseled going to the short-term parking lot next to the Holiday Inn across the street from the airport. Uber drivers could pick up passengers there without being harassed, this writer reported. But when Steve and I tried to follow his directions, we failed epically. The driver we were connected with texted us (in Spanish) that he could not get into that parking lot. He suggested meeting us elsewhere, but we couldn’t figure out where he was talking about. Finally, 20 minutes later, exhausted and irritated, we gave up and instead paid for a pre-paid taxi that turned out to be fast and efficient (if $10 more expensive than an Uber ride probably would have been.)

Our Airbnb apartment was fine, but by the time we reached it (around 10:30 pm), we were starving. (My advice: do not ever count on Avianca to feed you over the course of a long day.) Happily, a Japanese-Peruvian restaurant across the street was still open, and we gobbled down some excellent seafood and Pisco sours before climbing into bed.

The doorbell buzzing at 6 am Monday morning surprised us awake. It was our son Michael and his girlfriend Stephanie, arriving two hours earlier than we expected them, and with a friend in tow whose hotel wasn’t accessible until 2 pm. They all collapsed with exhaustion, and Steve and I took to the street to do some exploring.

It was barely 40 degrees, the sky a dismal steely gray, rain clearly on the way. Looking for a coffee shop, we passed countless giant apartment buildings, most of them ranging in style from plain to ugly. Graffiti covered a lot of the facades, some of it muralistic but much simple tagging.

On one corner a small knot of riot police appeared to be massing (though we saw nothing remotely riotous looking in the surrounding area.) We passed a number of dogs being walked, and I was charmed by how many were dressed, either in winter coats or raincoats. Still they didn’t look much happier than many of the people.

My spirits bounced up later, when we had collected Michael and Stephanie and Devin and headed to the historic heart of the city for a Chilean staple known as the “completo” — a hot dog laden with any of a host of toppings.

After lunch we strolled around the huge central plaza, popping into the cathedral and central post office. It started drizzling, but we plowed on, visiting the central market and a old train station that’s been converted to a social center. By then the cold rain was strengthening; the sky darker. By the time we reached the central library, a vast structure that reminded me of New York City’s, I was too cold and tired to want to go in (though Steve, Mike, and Stephanie soldiered on). Once back in the apartment, I took some pleasure in my phone’s report that I had covered 8.8 miles and climbed 20 floors.

Saturday morning, Santiago felt like a different city. The rain was gone, and patches of sunny blue sky flirted with light clouds. It took us a while to get organized, but by late morning, the five of us had walked to the foot of Cerro San Cristobal, a spur of the Andes that’s one of the city’s most prominent landmarks. An ancient funicular carries passengers up to the top, near the site of a tower Virgin Mary. She looks quite strikingbut even more dazzling were the line of snow-laden nearby Andes that she overlooks.

The sight of them energized all of us. After a nearby lunch, we covered a lot more ground, walking to a huge central food market……a striking arts complex… and more. We also had a fantastic meal that night (almost 30 separates tastes showcasing the ancestral foods of Chile).

The day made me feel we could easily have enjoyed at least a few more days in Santiago. But we wanted at least a glimpse of the vast Chilean wine country. We’re in the midst of it now. Outside my Santa Cruz hotel window, the sky looks awfully threatening. At least we have a rental car to (mostly) get us around.

Mexico City impressed me when I first went there, around the end of 1978. It was the first non-European capital I’d ever visited, and it felt exotic. It was the Third World, as we called developing nations back then. On our taxi ride from the airport to our Zona Rosa hotel, I remember eyeing shanties; smelling burning garbage. That visit also exposed me to world-class marvels: the pyramids of Teotihuacan, the city’s huge central plaza, its marvelous anthropology museum, Chapultepec Park. We hung out mostly in the chic neighborhoods, and I recall concluding that the city seemed a wild mixture of Paris and Tijuana.

I liked it a lot, and Steve and I returned several times over the next few years, but the worst things about Mexico City — its choking air pollution and awful traffic — loomed larger and larger over time. Returning from Oaxaca in 1984, we passed through briefly but then didn’t go back for almost 35 years.

Seeing Mexico City again over the last two days made me feel like I had napped and awakened in a world that was familiar but also different in startling ways. Driving from the airport into town I noticed nothing like those old-school Latin American slums. (They must still exist, but in less obvious areas.) We smelled no burning garbage. When we rode the metro, the cars were packed and humid but cleaner and less odiferous than some crowded American subways I’ve endured.

Even the name has changed. Traditionally known as the Distrito Federal (Federal District) or simply DF, the city three years ago became more jurisdictionally independent, at the same time getting rechristened as La Ciudad de Mexico. CDMX (part acronym, part brand?) is now emblazoned on everything from buses to garbage cans (three classes for trash, organic, and recyclables). The moniker made me think of a computer operating system; made the urban center it represents seem somehow jazzier. Indeed everyone has cell phones; Bird scooters and Uber drivers are ubiquitous. Over and over I was struck by how comfortable I was; how much Mexico City now feels like home, if more brightly painted and stylish than San Diego.

Because of our previous visits here, we had told ourselves we need not be frenetic about sightseeing, but in the end we couldn’t resist slipping into our old hyperactive ways. We covered almost 9 miles on foot Friday; more than 10 yesterday. We walked from our Airbnb apartment in the elegant old Condesa neighborhood to visit a new museum downtown dedicated to pulque (the mildly alcoholic ancient Mexican drink of the masses that has gotten trendy in recent years.) The museum proved underwhelming, but admission included tastes, so I can now report that both peanut- and red-wine-flavored pulque are delicious.

We spent time in two different art museums, one filled with the staggeringly huge collection of Mexican billionaire Carlos Slim.

Adjoining the Slim’s Museo Soumaya, the newish Museo Jumex, dedicated to contemporary art, was hosting a brainy exhibition focusing on the work of artists Marcel Duchamp and Jeff Koons. Besides us, it drew a throng of Mexicans of all ages.

Koons’ gigantic Play-doh pile (made of interlocking aluminum pieces rather than actual Play-doh) amazed me with its beauty and complex craftsmanship.

During our two days, we ate several meals at red-hot restaurants where we only lucked into tables because we arrived so much earlier than the locals.

What excited us more than anything was our experience in the city’s historic center. We decided to run down there on the spur of the moment, catching a metro from the Chapultepec station (5 minutes from our apartment) to the Zócalo. When I’d first seen it more than 40 years ago, that plaza blew my mind with its vastness. On Saturday afternoon, it seemed to have shrunk (probably in comparison with some of the other vast plazas I’ve tramped through over the years). Mexico City’s zocalo once was the site of a great pyramid in the heart of the Aztecs’ capital, Teotihuacan. But the Spanish conquistadors had torn the pyramid down and used the stones to create the plaza and cathedral and the other grand buildings that still surround it today.

The Spaniards’ willingness, even insouciance, about obliterating every trace of another civilization horrified Steve and me on our first visit. Back then we were intrigued by news of a recent discovery by some electricians working on metro construction. They had found a huge disk honoring the Aztec moon goddess that suggested part of the original temple might still exist, buried under the city that developed over it. Work on investigatory excavation had started, but it looked pretty puny. Still, it held promise.

My biggest Rip Van Winkle moment was seeing what has happened since. The Templo Mayor complex, as it’s now known, today covers a huge area behind the Cathedral.The biggest outer pyramid, which honored the war god Huitzilopochtli and the rain god Tlaloc, is gone. But you can clearly see the remains of what it once sheltered: about a dozen levels of construction dating from 1375 to 1519. You can stare at the double staircase where the bodies of human sacrificial victims were thrown down the steps after their hearts were ripped out. An impressive museum fills in a lot of the details, gory and otherwise. The power and scale of what once filled this space are unmistakable. It made me happy to see two of the main cultures that shaped this country co-existing more equitably.

I should add a brief mention of the biggest disappointment of this visit. According to our iPhone weather apps, the air quality was still “Unhealthy” (in the 150-200 range — compared to the 20-50 that’s more the norm in San Diego). It wasn’t as stratospherically bad as the air in India last fall. It didn’t seem as bad as the air I remember from my early forays here, but that’s probably because summer is the rainy season, which washes out some of the pollution (and we used to visit in the wintertime). I wish I could return in another 35 years. Even sooner. It seems possible more good changes may be evident.

But I’m posting this now from our Airbnb in Santiago, where we arrived last night. We’ll have about 6 days in Chile, and throughout that time we’ll be filling a blank slate.

Steve and I finally got to use the new(ish) cross-border footbridge that enables pedestrians to walk from San Diego (Otay Mesa) to Tijuana’s international airport, and what a pleasure that was. The last time we flew out of TJ was decades ago, and I’m sure we did it because the fares on Aeromexico were cheaper. I remember the whole experience as nightmarish. First you had to drive to the border and cross it, then grind on for what felt like ages through bad slums and poorly designed roads. The terminal itself was dingy and jammed with endless lines of travelers schlepping gigantic suitcases and other paraphernalia. Steve remembers seeing ripe, discarded baby diapers and other trash strewn on the terminal floor.

What we saw on this departure was almost unimaginably different — spotless marble floors, good lighting, comfy waiting areas, tempting food choices. Best of all was getting to the Tijuana terminal. Our friend Alberto gave us a lift from our house to the clean modern building on the US side of the border (quite close to where Trump’s big, beautiful, wall prototypes were erected.) It took us just minutes to buy our one-way tickets ($20 per person) to walk across the bridge and obtain our Mexican visas (from a high-tech kiosk). We scanned the bridge ticket and our boarding pass at a gate that opened for us automatically. Then we strolled over and above that pesky border between the two countries. The passage couldn’t have taken even five minutes.

Emerging into the Mexican facility, we joined a line that briskly moved through immigration and customs to emerge in the spiffy terminal, steps away from the VIP Lounge. We could use it because we get free Priority Passes with our Chase Sapphire credit cards.

When I was shopping for flights to Mexico City, I was startled to learn that NONE depart from San Diego. Now I understand why. The carriers out of Tijuana compete ferociously. (We paid just $67 per person for the three-hour-plus flight, and I have friends who’ve snagged $70 round-trip bargains occasionally.) Even adding on the bridge-crossing fee, it feels like a great deal. Being able to saunter across the border as we did, one could almost glimpse a different, brighter future.

If only the rest of our transits on this trip are as smooth and stress-free….