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.
The Netherlands.
USSR
Athens did not have Olympics. It was hosted by Elis.
Winter Olympic: Grenoble, France Summer Olympics: Mexico City, Mexico
The city of Grenoble in the Rhone Alpes hosted the 1968 Winter Olympics.