This image shows the course of the ‘new’ scenic drive which winds inland towards Mt. Cadillac in the distance.
Color by Alton Johnson
The description states:
New Scenic Drive to Summit of Mt. Cadillac – Mt. Desert Island
—Cadillac Mountain at 1,528 feet is the highest peak within 25 miles of the coast from the Canadian border to well south of the Mexican border.
This image likely dates from the 1950s.