Hello Folks,
if you fear to forget on which places you ever have been at this planet you can get an overview after you selected the appropriate countries:
me for example --->
<img src="http://www.world66.com/community/mymaps/worldmap?visited=USMXATBECZDKFRDEHUPLESCH"><br/>
<a href="http://douweosinga.com/projects/visitedcountries">create your own visited countries map</a>
<----- a lot more countries need my attention ;D