1) The Hollywood Walk of Fame features more than 2,690 stars embedded in the sidewalk, honoring notable figures in the entertainment industry.

2) The Mona Lisa, painted by Leonardo da Vinci, is one of the most famous and valuable artworks in the world.

3) The first car with air conditioning was released in 1939.

4) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.