Below is a map showing the most accessed website in any country. The data has been presented in the form of a world map and makes an attempt to give a clear picture of dominance.
(click on the image to open a bigger picture)
Google is the most dominating website in the world followed by Facebook. In China, Baidu is the undisputed king and in Russia, its Yandex. Yahoo is still the most popular website in Japan and Congo.
The source of data is Alexa rankings which keep a track of website rankings. The information derived from the data is on the expected lines and just goes on to show the dominance of Google over the Internet.