This image shows a traveller driving along the Trans Canada highway as it passes along an inland lake near White River, Ontario.
Alutone Reproductions by E. S. & A. Robinson (Canada) Limited, Leaside, Ontario
The description states:
CANADIAN LAKE SUPERIOR POST CARD SERIES
Trans Canada scenic highway winding among the inland lakes in the Wawa, White River area.
–This postcard likely dates from the 1950s.