1) The assassination of Archduke Franz Ferdinand of Austria in 1914 triggered the start of World War I.

2) The word "country" contains three vowels: O, U, and Y.

3) The world's largest desert is the Sahara Desert in Africa, covering an area of about 3.6 million square miles (9.4 million square kilometers).

4) The Himalayas, known as the "Roof of the World," are home to numerous majestic peaks, cultural diversity, and unique wildlife.