Marking the spot where you have been has made possible by Foursquare and people, like me enjoyed it very much.  Check-in here and there!

For the information of those who don't have an idea about Foursquare, it is a location-based social networking site for mobile devices where users “check-in” at places through smartphones, text message or apps.  So now that you know, Foursquare will be coming up with a special holiday for Foursquare aficionados – the much-anticipated #4SqDay!