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

2) The Plitvice Lakes National Park, situated in Croatia, is a stunning natural wonder known for its cascading lakes, waterfalls, and vibrant turquoise-colored waters. It is a UNESCO World Heritage site and attracts visitors who come to explore its picturesque trails and scenery.

3) The word "pencil" contains two vowels: E and I.

4) The world's largest desert is the Antarctic Desert, covering around 5.5 million square miles.