Which country first created the under ground train,( tube or metro) and which country has the deepest?

Question

Which country first created the under ground train,( tube or metro) and which country has the deepest?

Answer 1

1st:  London, England; Metropolitan Railway; 1863

Deepest:  St. Petersburg, Russia; Admiraltejskaya (The Admiralty); 102 metres(344.6 feet)

Answer 2

UK; London Underground, Metropolitan line was the first

Glasgow was the second city with an underground,

Prague was the third.

The deepest section is London's Vitoria line between seven sisters and highbury and islington

Answer 3

Is that the Train that goes between France and England un the English Channel? It's called The Chunnel?

Answer 4

i'm a volunteer at a trolley museum, and we have one of the subway cars from the world's first subway.  it was in budapest.