What draws me in is that a trip is a leap in the dark. It's like a metaphor for life. You set off from home, and in the classic travel book, you go to an unknown place. You discover a different world, and you discover yourself.
I have spent my life on the road waking in a pleasant, or not so pleasant hotel, and setting off every morning after breakfast hoping to discover something new and repeatable, something worth writing about.
Reading is also a journey. It's a process of discovery.