1) The word "computer" contains three vowels: O, U, and E.

2) Mount Everest, located in the Himalayas, is the highest mountain on Earth, reaching a peak elevation of 29,032 feet (8,848 meters).

3) The national animal of Canada is the beaver.

4) The Giza Pyramid Complex, situated on the outskirts of Cairo, Egypt, is home to the iconic Great Pyramid of Giza, one of the Seven Wonders of the Ancient World. It was built as a tomb for the pharaohs and represents the pinnacle of ancient Egyptian architecture and engineering.