As you walk down a typical street in Manhattan the first thing you notice is just how straight it is. Roads in Manhattan have actual vanishing points, like railroad tracks. You walk slowly towards this point that you will never reach, and the cross streets come up one at a time, at perfectly spaced intervals and at perfectly right angles. First you look left, and then you look right, and you're taken aback at how perfectly straight those roads are as well, and how they also seem to go on forever in the distance.
It feels like Manhattan is made up entirely of infinite streets. It's so big that you feel like you're missing out on most of it, like each road you pass on your way to your destination is a lost opportunity, a story you'll never get to hear. You feel like there are countless Woody Allen movies and Seinfeld episodes going on at the same time but you'll never know anything about them because you didn't choose to walk down those roads. The sense of loss can be very powerful.