The Facebook has a notification icon which is nothing but a small glob and the most interesting things is it changes its map view with the location.
For example :
- This is the Facebook notification icon with US and Latin America.
- This is the icon for countries in the Eastern hemisphere:
Quoted from the source:
"It’s the small things in life that can make a difference, and this is a nice way to acknowledge that Facebook is a global service, not just from the US."