Exchange Street runs north-south through the heart of the Old Port District. Amble slowly along the red brick sidewalks. Window shop to your heart’s content. Pick up something special from one-of-a-kind stores. Stop for a drink or bite to eat. This historic neighborhood is one of the main reasons (pun intended) Portland is a unique destination. When you are ready (there is no hurry), walk west on Middle Street. Within a block it becomes Spring Street.