Besides being a coming-of-age story, it's also a road movie. The year is 1971, and Viet Nam's in full swing. Kevin Costner and four of his fraternity brothers (one of whom remains mostly unconscious for the entire running time) know that their draft numbers are up. They decide to have one last fling before whatever comes next, and they set off in a beautiful blue Cadillac. You can see a little of it in the poster there on the left. They have some amazing and hilarious adventures before the end of the journey, and I got a huge kick out of all of them. You can check the trailer above for some snippets of two of them.
I'm a nostalgic kind of guy, and this movie pushed a lot of the right buttons for me. It was the movie that brought Costner (who's very good) and Kevin Reynolds together, but don't hold that against it. Check it out.