The underground train system in Stockholm is called 'tunnelbana', t-bana or T-train for short. There are three lines, imaginatively named 'red', 'green' and 'blue', though they missed a trick of making the trains the same colour as the line they're running - I assume because they use the same trains on the different lines. A lot of the stations, especially on the blue line (the one through Kista) are hewn out of solid rock and left fairly rugged on the inside, feeling more like a cave than the London tube system I'm used to. The stations are also less infested with advertising, instead containing quite a lot of artwork to brighten them up.
