Goggles is a Google Maps flight simulater you play in your browser. There are a bunch of predefined locations or you can use your own location (through a bit of work).
Here is a link to fly over Niagara Falls. Hint: Head east until you reach the river then turn south.
http://www.isoma.net/games/goggles.html?loc=tqsqttsrsssttqssq