Trams that Act like Metros around the World (Top 10 Underground lightrails/streetcars)

Is this a tram, lightrail or a subway??

For many light rails or trams they may act like a subway or a metro once they hit downtown portions of their cities. Some of them have more metro elements than light rail!

So are these systems subway, metro, light rail or trams? Or a combination? What other systems are out there that are cool looking, that remind you a lot of trams but are underground.

Check out Part I which has another Top 10 - trams that act like metros
https://www.youtube.com/watch?v=bQ1lPVeNH3o
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Видео Trams that Act like Metros around the World (Top 10 Underground lightrails/streetcars) канала Timosha21