Kentucky, also known as the “Bluegrass State” is a state located in the east-south-central region of the United States of America. Kentucky’s capital is Frankfort, but its largest city is Louisville. According to Kentucky State Data Centre (KSDC), Kentucky has the population of approximately 4 million people. Here are some interesting facts about Kentucky.

1. Kentucky was the 15th state to join the union on June 1, 1792.

2. Kentucky was the first state to have a full-service public library for African Americans. It was the Louisville Free Public Library opened in Louisville, Kentucky in 1905.

3. Abraham Lincoln, President of the Union, and Jefferson Davis, President of the Confederacy, were both born in Kentucky.

4. Abraham Lincoln is the only president of the United States born in Kentucky.

5. Mammoth Cave in Kentucky is the world’s longest known cave system.

6. Black Mountain is Kentucky’s highest point (4145 ft.), while Mississippi River at Kentucky Bend is its lowest point (257 ft.).

7. First hand transplant in the United States took place at Jewish Hospital in Louisville, Kentucky on January 25, 1999.

8. In 1883 at the Southern Exposition in Louisville, Kentucky Thomas Edison introduced incandescent light bulb.

9. High Bridge near Nicholasville is the highest railroad bridge in the United States.

10. In 1893 Mildred and Patricia Hill, two Louisville sisters, wrote the most sung song in the world; “Happy Birthday to you”.

11. In 1976 tulip tree became the official tree of Kentucky State. Before that the official tree was coffee tree.

12. In 1873 druggist John Colgan from Louisville invented the chewing gum.

13. In 1892 Nathan B. Stubblefield of Murray from Kentucky invented the radio. This happened three years before Marconi claimed it his.

14. Bowling Green, Kentucky is the only place in the world where Chevrolet Corvettes are made.

15. Held at Churchill Downs in Louisville, Kentucky Derby is the oldest continuously held horse race in the United States.

16. Opening ceremony of Kentucky Derby includes world’s largest firework show.

17. The Cathedral Basilica of the Assumption in Covington, Kentucky has the world’s largest hand-blown stained-glass window. The window is 24 feet wide and 67 feet high.

18. The Lost River Cave and Valley Bowling Green has a cave with deepest and shortest underground river in the world.

19. Kentucky was the first western frontier state to join the Union in 1792.

20. The first commercial oil well was dug on the Cumberland River in McCreary County.

21. Pike County is the world’s largest producer of coal.

22. Fort Knox, Kentucky has the largest amount of gold stored in the world.

23. There is only one town in the United States built in a meteor crater. It is Middlesboro, Kentucky.

24. The first Colonel Sanders’ Kentucky Fried Chicken (KFC) restaurant was opened in Corbin.