Curious to see how the peaks aren't specifically for a country, but for a region. The tallest peaks within Brazilian territory geographically correspond to São Paulo (actually, Sao Paulo's neighboring region including Guarulhos as well as Campinas) and Rio de Janeiro. Between them it's possible to see a smaller peak, it's probably Belo Horizonte. The peak below is probably Curitiba. There are peaks on the northeast corresponding to Northeastern capitals, such as Salvador, Fortaleza and Natal. The Brazilian north and middle-west are sparsely populated. So, in a sense, the indicators are specifically placed within the map, corresponding not just to countries, but accounting for local demographics as well. Nice.
The long ‘island’ north of Iceland and the long island to the left are probably the inhabited parts of Greenland. The north of Canada and the North of Russia seem to be very sparsely populated, too. So are the arid regions of Africa and Saudi-Arabia. According to my interpretation of this map.
After looking closely at the cropped image found on reddit, I think the southward pointing notch ('bay') of the Mediterranean is in fact part of the Sahara desert. The blue area next to that then is the Nile delta with the tall peak, Cairo. Palestine then starts next to the dark corner on the right from it.