Rodents

I really like that there are rats in the NY subway. Maybe that's not sanitary, because the rats carry diseases and maybe it's cruel because they often get run over by the trains and maybe it's weird that I like that rodents run on train tracks under one of the busiest cities in the world. But I think it's cool that in such a seemingly lifeless environment, these creatures live and procreate, despite the rodenticide that the city sets out to try to eliminate this problem. If you're not looking for them, you probably won't even see them, which is also a lesson in being alert and attentive. Cool stuff.