Dangerous city with lots of crime, buildings covered by grafitti and sidewalks full of holes that you can fall on. Inhospitable to tourists although there are intersting sights to see including the Recoleta Cemetery, the Palermo restaurants and shopping and rose Garden and zoo and downtown.
The Old City has amazing archtecture and great photo opportunities.
Ushuaia is an interesting city built on a hill. The excursions in the Beagle Channel to see islands of penguins is a good value.