1) The book series "The Chronicles of Narnia" by C.S. Lewis has sold over 100 million copies worldwide.

2) The Grand Canyon, located in Arizona, United States, is a massive and awe-inspiring natural formation carved by the Colorado River. It is approximately 446 kilometers (277 miles) long, up to 29 kilometers (18 miles) wide, and reaches a depth of over 1.8 kilometers (1.1 miles).

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

4) Mount Kilimanjaro in Tanzania is the highest mountain in Africa and attracts climbers from around the world.