Huckleberry Finn

The novel mainly takes place on the mississippi river, where Huck Finn encounters many strange things. A prevalent theme, related to Huck's travels on the river, is finding himself through a great journey. The river, for Huck and maybe even Jim, is the journey of life and all the things that happen to him (them) on the river are the aspects that make up life; the truths.
For example, Huck's encounter with the Grangerfords; they have a senseless feud going on with the Shepardsons, showing that people need to be aware of their traditions and why they follow them.