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.