See? Wasn't that awesome? Anyway, this song is featured a few times throughout the film, but perhaps the most iconic moment is... SPOILER ALERT... right after Harold drives his car off the cliff and stands on the edge with his banjo in hand. He slowly walks away strumming the tune as the soundtrack fades in and the credits roll. Absolutely perfect.
You can view a clip of the scene in question here. (Starts at around the 2:45 mark)
Inspired by all of these wonderful things, I made this print.