This is an interesting and cool tool provided by TripAdvisor for Facebook - (yes I have a Facebook page, but hardly use it at all).
MyTravelMap allows you to mark places you have visited - it is very accurate. All you need to do is click on a map provided by Google, and MyTravelMap does the rest.
Here's my map....
As you can see I have not been outside of Europe or North America much - just India (on business with SmartForce in 2001) and Morrocco on holiday.
Other countries I have been to: Canada, USA, England, Wales, Scotland, Holland, France, Spain, Portugal, Italy, Austria, Germany, Croatia (when it was Yugoslavia - 1986 on my honeymoon), and Greece.
Other countries I'd really like to go to: Australia, New Zealand, Belgium, Israel, Japan, Argentina, Brazil, Chile, Denmark, Iceland, Norway, Sweden, and Finland. There are sites that allow you to mark "Places to see before you die" - I think I'll add a few!