1-Tokyo Metro, Japan: Tokyo's metro system is known for its punctuality, extensive network, and high passenger capacity.

2- Seoul Metropolitan Subway, South Korea: The Seoul Metro offers extensive coverage with lines reaching far into the suburbs.

3- London Underground, United Kingdom: Also known as "The Tube," London's metro system is one of the oldest and most iconic in the world.

4 - Singapore MRT, Singapore: Singapore's Mass Rapid Transit system is known for its punctuality, cleanliness, and advanced technology.

5- Hong Kong MTR, Hong Kong: The Mass Transit Railway in Hong Kong is one of the most efficient and profitable metro systems in the world.

6- New York City Subway, United States: The NYC Subway is one of the largest and oldest metro systems globally.

7-Paris Métro, France: The Paris Métro is known for its intricate network and iconic Art Nouveau entrances.

8- Dubai Metro, UAE: Dubai's metro system is one of the newest and most advanced in the world.

9 - Moscow Metro, Russia: The Moscow Metro is known for its beautiful stations adorned with art and architecture

10- Shanghai Metro, China: Shanghai's metro system is one of the largest and busiest in the world