You should visit La Paz because of the topography. Not because it is a great city, which it hardly is, but because of the way the city climbs up the walls of the valley it’s situated in, near 4000 meters above sea level.

A sidenote: the travel companies in this city claims it is among the cities in South America with the least crime rate, but still every Western Union has at least one guy in front of it with a shotgun.

PS: I didn’t have any problems with the altitude (apart from getting short winded now and then).