At the Bangor Mall, between Hampton Inn and Toys ‘R’ Us on one side, and Borders and Staples on the other, is a small valley that a creek flows into, feeding two ponds. The outflow runs into a culvert under I-95. According to a woman I ran into there, it was left this way for drainage. When the snows melt in the spring, it fills up. She also told me an otter lives there.