Howard Johnson Publishing
Blue Mt. Tunnel EntranceBLUEMOUNTAIN
4-M PENNSYLVANIA TURNPIKE"World's Greatest Highway"Eastern entrance to Blue Mt. Tunnel (4339 ft. long), first of seven tunnels which the Pennsylvania Turnpike FOR passes westward through seven ranges of the Appalachian Mountains, the longest of which is over a mile in length. Color photo by Herbert Lanks, Des Franklin, Howard Johnson 6
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