Sad that most have only visited 2, but amazing that so many have visited 7. Of course that assumes the 7 include Antarctica. I was always told that India is a sub-continent, which sounds a bit demeaning. Greenland and Central America (inc. Carribean and Mexico) likewise.

I guess the term "continent" is out of date, ever since the 1960s. Maybe the poll should ask "How many tectonic plates have you visited?". Icelanders can chalk-up two just by walking around.