- Niagara Falls is the most popular day trip for visitors to Toronto.
- Niagara Falls began at the end of the ice age, 12,000 years ago, and has eroded back 1 m (3 ft) per year over a distance of 11 kilometers (7 miles) to its current location.
- The first person to go over Niagara Falls in a barrel was a 63-year-old schoolteacher from Michigan. Annie Taylor tackled the Falls in 1901 and survived.
- Jesse Sharpe, a 28 year old
from Tennessee, went over Niagara Falls in a kayak on June 5, 1990.
Robert Overacker, a 39 year old from California, used a jet ski to go
over Niagara Falls on October 1, 1995. Neither of them survived.
- On October 20, 2003, Kirk Jones, a 40-year-old Michigan man, intentionally went over Niagara Falls without any protection and survived. He swam out at the bottom.
- Over five million horsepower or four million kW hours of electricity are generated by the Niagara River.
- During the War of 1812 between the United States and Great Britain, over 80% of the land battles took place along the Niagara River.
- On December 24, 1814, the Americans and British signed the Treaty of Ghent, called the Peace of Christmas Eve. With the conclusion of the war, peace was returned to the world's longest undefended border.
- Niagara-on-the-Lake was home for Ontario’s Parliament. Among other noteworthy legislative achievements, the world’s first anti-slavery law was passed here in 1793.
- The world's first railroad suspension bridge was erected over the Niagara River in 1848.