This image shows a typical day boat transporting sightseers through the Thousand Islands area of Ontario Canada. This particular section is known as Lost Channel.
Published by The Gananoque Reporter, Gananoque, Ontario
The description states:
CRUISE BOATS IN LOST CHANNEL
Thousand Islands, Ontario, Canada
—The tours are still conducted, and as might be expected, the boats have been considerably expanded and upgraded since this picture was taken.
This image likely dates from the 1950s.