Really, I would have thought of the 7 continents Australia would be easiest being one country

?
I have been to all seven continents (as taught in many US and British schools) so Australia would be all the countries in Australia.
North America is quite hard to hit every country. Many do not snake their way from Panama all the way to Canada, but I have, though not from driving.
El Salvador was the last one I was waiting on and got that two years ago.
I am close for South America but need Suriname and French Guiana and Bolivia.
Ciao,
FH