It may not be the biggest or the tallest waterfall in the world, but it's definitely one of the most famous. With a distinctive green colour due to a mix of rock flour and salts, the three waterfalls pour across the border of the US and Canada. If you're ready to brave the spray of the waterfall, board the Maid of the Mist for a boat tour that takes you straight to the bottom of the falls or you could trek to one of the many observation decks and watch from above.

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