Trainspotting
The title "Trainspotting" comes, of course, from Irvine Welsh's 1993 cult novel, in which he describes Edinburgh's junkie scene. In one passage of the book, he refers to the fact that the hobby of train-watching is incomprehensible to outsiders – just like heroin use. But if you take the time, you can discover a great deal on trains, carriages, and in train stations. And all without heroin use!