Quest for the rings - Seoul 1988

Seoul 1988 poster

You were right again - these games are in Seoul, capital of South Korea. The year is 1988.
You have recovered the fourth ring. Now you need only to collect the last one and you will be the lord (or lady) of the rings. You think that you may find it by going to the 1992 Olympics. In this year the Olympics came to Spain in the European Union, and Spain's King, Juan Carlos, opened the games.

Four Olympic rings again - one more to go

You need to find the name of the city that hosted these games. Which is it?