Mexico City, Mexico hosted the 1968 Summer Olympics.
Summer: Mexico. Winter: France.
No African country has ever hosted the olympics
Rio, Brazil hosted the Olympics in 2016.
Barcelona, Spain hosted the Olympics in 1992.
Cambodia is a very poor country that could not afford to even consider hosting the Olympics, never mind that from 1968-1999 the country was in a perpetual state of upheaval.
There was no Olympics held in 1982.
USSR
The Netherlands.
Athens did not have Olympics. It was hosted by Elis.
The country that hosted the olympics in 1988 was seoul,south korea
The city of Grenoble in the Rhone Alpes hosted the 1968 Winter Olympics.