amcharts for building maps  

  google geocoder to decode entered address and build a google map, base on coordinates  

  countries API to get country details 

• User Profile

   1. User model stores information about visited countries and loads map in profile page .
   2. User can change avatar
   3. User model stores home coutry information and loads map in profile page .
   4. Each user can play GAME basing on the countries he visited.
 

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• Posts

   1. Post model has visited places/ visited  cities which works with google geocoder.
   2. Each visited city is link to wikipedia
   3. Post has Like and Unlike
   4. Post has type of trip like: relaxing, history rich and etc.
   5. Post has tags 
   6. Each post has small visited country map with main regions on it.
   7. You can add additional fields (dynamicly created inputs) while creating post