it's the busiest line in london but it's so useful cos it doesn't stop at the places no one has heard of, it stops at places like brixton, stockwell,vauxhall,pimlico,victoria(wonder why),green park,oxford circus and some other places i can't remember lyk tottenham hale and kings cross st.pancras! woo! vicky line is a cool colour too!
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it takes to to victoria and tottenham hale train stations... and then back to st pancras! i dont know what i'd do without it

Northern, of course.
First, the most interesting shape.
Second, one of the oldest deep level tubes.
Third, it stops at Leicester Square.
Forth, the omly tube that serves Camden Town.
Any questions?

District Line All The Way. "Go District"