Thailand, https://photos.google.com/share/AF1QipMNGiEkdfeZKK5uus5iOmt-... Pic is called base64 (upvote this so we can start a new subthread)
"Answer to last puzzle:
You can put the names of the countries into the spaces on the board and add/subtract from letter values appropriately.
This gives you:
L IN E
THEATRE
SHO RE
AM P H I
(Shoreline Amphitheatre)
5/17, 5/18, 5/19 are the dates of Google I/O, at the Shoreline Amphitheatre in Mountain View, CA. :|"