Located in Amity valley is the western outlet of the Heroes Tunnel, a twin tunnel which carries the Wilbur Cross Parkway through approximately 1,200 feet (370 m) of solid traprock beneath West Rock Ridge. It is the only tunnel on a limited-access highway in the state of Connecticut. The southbound roadway on the Wilbur Cross Parkway ascends sharply when exiting from the Heroes Tunnel, climbing over 250 feet (76 m) in less than 2 miles (3.2 km), the steepest inclination on any limited-access highway in the State of Connecticut. When travelling northbound on the Wilbur Cross Parkway approaching toward Exit 59, the roadway descends sharply into Amity valley, offering a scenic vista of the West Rock Ridge, the twin tubes of the Heroes Tunnel, the City of New Haven to the south, and the glacial valley of Amity which opens to the north.