My last couple weeks in Buenos Aires I finally got around to doing a bit of sightseeing. You really only need to spend 3-4 days in the cities to see most of the tourist sights, although it’s the kind of place you could easily stay for ages just to enjoy walking the neighborhoods, eating in great restaurants, relaxing in cafes, and going to special events.
In no particular order, here are the touristy things I thought were worth seeing:
Recoleta Cemetery

Where the rich and famous show off by building elaborate mausoleums. Many of Argentina’s famous politicians and wealthy families are buried here, and it’s still a functioning cemetery where the modern-day elite aspire to rub their deceased shoulders with the likes of Evita. The cemetery is huge and has the feel of a city, with a network of streets weaving through hundreds of mausoleums. Most are ornate and in good repair, but some are really degraded. I’m not sure exactly how it works, but it seems you (or your family) somehow need to keep paying for maintenance. Some tombs were damaged and in a really unfortunate state considering there were still coffins inside. Also, in case you were considering it putting a skylight in your mausoleum is not something I would recommend.
La Boca

Possibly Buenos Aires’ most touristy place, this famous neighborhood is known for its brightly painted buildings, art museums, and its association with tango. There’s one street several blocks long packed with tango-themed cafes and restaurants with performers who will dance together and then drag tourists on stage to give tango a try. If you’re interested in tango, it’s possible to take classes in many places in the city. Attending a milonga (community tango dance) is another good option – you can watch lots of people dancing with their partners, and professors often give performances and demonstrations. There’s something really cool about seeing aging couples dancing together dressed to the 9s. Considering the dramatic events of the last 40-50 years in Argentina, it’s like watching a bit of history.
Downtown

There is a solid cluster of photo-ops in downtown Buenos Aires, including Avenida 9 de Julio (a massive 18-lane avenue), the Obelisk, Casa Rosada (the Rose House, where the President lives. Tours available in Spanish), Plaza de Mayo, Teatro Colon (one of the world’s great opera houses, newly restored) and the main plaza surrounded by opulent government buildings.
Puerto Madero
This port was constructed for many years, only to be deemed too small once it was finished. The area was instead converted into an upscale place with fancy restaurants, cafes, ice cream shops, waterfront promenades, condos, and a museum on a retired naval ship.
San Telmo

A bit sketchy at night, but packed with great restaurants, bars, and clubs. During the day on Sundays there’s a huge antiques fair in Plaza Defensa, and at night the plaza is filled with tables and chairs for an outdoor bar. One of the city’s most popular neighborhoods.
Palermo
The definition of Palermo has crept over the years to become an area so large it now has to be subdivided into Palermo Viejo, Palermo SoHo, Palermo Hollywood, Palermo Chico, and a few others that I’m sure I’ve forgotten! The neighborhoods are filled with cafes, restaurants, and boutique shops, but this is still primarily a residential area and is a great way to see what a typical nice Porteño neighborhood is like. Don’t miss a night in the outdoor bars near Plaza Serrano followed by dinner at any of the nearby parillas (Argentine grill restaurants). Order a parillada to share among the table; they’ll deliver a massive grill filled with coals and heaped with chorizo (sausage), morcilla (black sausage), vacio (steak), costillas (ribs, usually beef), and perhaps some exotic bits like the intestines or even tripe. It’s a great value, delicious, and about as Argentina as food gets!
Cafes and Bookshops

Buenos Aires has lots of cafes and bookshops that stand out. El Ateneo Grand Splendid is an amazing bookshop set in a restored old theater. Las Violetas is an ornate old-school cafe with waiters in white bow ties. They serve absolutely massive hamburgers, and if you go with a group you can order a picada platter crammed with a variety of sandwiches. They also have a bakery with dozens of different types of cakes and candies. Las Violetas isn’t near much of anything else on the tourist circuit, but you can go there on the A-line subway, which is an interesting experience itself. The A-line was the first metro in Latin America and many of the trains still running on this line are rickety antiques with wood-paneled interiors and manually operated doors. Classica y Moderna is another neat bookshop that is a good example of a typical city bookstore. It’s got a nice cafe up front and tall racks of books crammed in the rear. Cafe Tortoni is classic cafe downtown, known best for its history of having famous Argentina writers, artists, and politicians among its clientele. For Example, Luis Borges, Carlos Gardel, and Alfonsina Storni.
And More

Of course there’s plenty of other options too. A futbol match, going to the horse races at the hipodromo, taking a train to the river delta in Tigre, going to a milonga (tango dance), etc. And remember that a typical weekend night out is dinner from 11pm-1am, drinks for a few hours, then a club til dawn!