Found a site where you can click on all the countries of the world that you have visited and create a map. Here it is.
create your own visited countries map
I didn't include any countries where I had only been in the airport--countries like New Zealand and South Korea. But it is a bit misleading because it shows all of China when I've been to Hong Kong, Macao and a little bit of what used to be called Canton Provence. Same with Brazil where I've been to Rio.
You have to look very hard to see the small red dot off the coast of Madagascar that is Mauritius.
Here's the US map.
create your own visited states