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Niagara falls is in NY.
Niagara Falls has been around since the ice age.
approx. 62miles
18km
18 km long
really long for those who care
10 or 20 days
22,000 metres long
400 miles is the distance from Philadephia to Niagara Falls. It takes about 7 hours to drive.
That would depend on where you started from.
about 350 miles
7 hours