" A dark-windowed diesel train burst out of the building, close enough to make the bus shake. It helter-skeltered downward into the earth. “Where’s it going?” Zanna said. “Crossing the Odd, to some of the other abcities,” Jones said. “If you’re brave enough to try, you might be able to catch a train from UnLondon to Parisn’t, or No York, or Helsunki, or Lost Angeles, or Sans Francisco, or Hong Gone, or Romeless…It’s a terminus. "

― China Miéville , Un Lun Dun