1) The word "banana" contains three vowels: A, A, and A.

2) The Great Wall of China is a UNESCO World Heritage site and one of the most iconic man-made structures in the world. It stretches over 21,196 kilometers (13,171 miles) and was constructed to protect the Chinese empire from invasions during ancient times.

3) The Arctic Ocean is the smallest and shallowest ocean, located at the North Pole. It is covered by sea ice for much of the year.

4) The FIFA Ballon d'Or is awarded annually to the best male football (soccer) player in the world, as voted by national team coaches, captains, and journalists.