Question: In addition to the New Haven Harbor, what additional natural element is a prominent geographic feature of the area, flanking the northeast and northwest boundaries?
Sentence: West Rock has been tunneled through to make way for the east-west passage of the Wilbur Cross Parkway (the only highway tunnel through a natural obstacle in Connecticut), and once served as the hideout of the "Regicides" (see: Regicides Trail).
Answer in sentence: no