Hilly La Paz and its oxygen-starved streets is one of South America’s highlights, without doubt. It is the world’s highest capital city at 3,650 metres above sea level. You will notice the altitude the most when trying to walk up one of the city’s many hills, only to find yourself bizarrely puffed out barely half … More La Paz: Witch’s Market, Coca Leaves, Llama Foetuses