I first learned about La Paz and its even higher-elevation sibling city El Alto from this video [1] about their new cable car transportation network [1][2]. I then spent a few hours on Google Maps and Youtube looking at El Alto up close, what a fascinating and different world up there.

https://www.youtube.com/watch?v=a5126u88E7E

https://en.wikipedia.org/wiki/Mi_Telef%C3%A9rico