On this day in 1859 , French acrobat Charles Blondin crossed Niagara Gorge on a tightrope, turning him into one of the world's most famous tightrope walkers.
On this day in 1894, London's Tower Bridge, a combined bascule and suspension bridge over the River Thames, opened.
On this day in 1987 , the Royal Canadian Mint introduced the Canadian one-dollar coin, commonly known as the Loonie.