At another store, I recently saw this book from 1978 called Canada which includes an introduction by Harry J Boyle (apparently he was a famous CBC broadcaster). The book has information about different parts of Canada and there was a section about Niagara Falls:
Niagara Falls, where the mighty Niagara River plunges over the escarpment into a deep gorge, is one of the world’s most spectacular shows of natural beauty. The Canadian Horseshoe Falls measures 671 metres across and are an impressive 54 metres high. First described by a priest who travelled with La Salle, the Rev. Louis Hennepin, the falls have attracted honeymooners, stunt-men and tourists since the early 1800’s. The river also provides, at this point, much of the hydro-electric power for Ontario and New York.
This shot of the Falls is great, as the only building you see is the Tower Hotel. There were no other big buildings at all.