My favorite book of all time is the Alchemist, by Paulo Coelho. I first read it in 1998 on a train ride from the south of Spain to the south of France. (Granada, Spain, to Pau, France.)
As I began reading the book, I realized that the region where the book took place, Andalucia, Spain, was the region I was traveling through!
The book was life-changing, and the story has stayed with me ever since.