1) The word "country" contains three vowels: O, U, and Y.

2) The Industrial Revolution led to significant urbanization, as people migrated from rural areas to cities in search of employment in factories.

3) The musical "Les Misérables" is one of the longest-running shows in the West End and Broadway, with over 13,000 performances.

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