I learned that there was a website where I was able to create the following map of countries where I have been. My trip to Hong Kong (with a day in Gangchow/Canton) means I get to count China, and my trip to a dive resort across the border of Israel in Egypt allows me to count that whole country too. The map also shows a Scandinavian country too many: I really only highlighted Denmark.
Here is the link if you want to make your own map:
create your own visited countries map
It's fun to make this map and also to look at the comments on the site from people discussing what should be meant by a "country." There is an option for a US map of states one has visited as well.