Smell is stimulating. It stirs things up and makes us nostalgic - a wonderful word which literally means 'ache for home' - which serves to inspire new circuits in the brain.
If you simply walk on the beach as we are doing, you have no special color. But if you travel with a purpose, it is different. When you go somewhere important or you return home from a long journey, you build a shape around you and it reaches out ahead to touch your destination.