Over the Edge: A Pictorial of One of Earth's Natural Wonders
About a fifth of the world's fresh surface water resides in the Great Lakes — the legacy of ice sheets that gouged out basins and filled them with meltwater at the end of the last ice age. Over the July 4th holiday, I watched what happens when many millions of cubic feet of that water hurtle at freeway speeds over a precipice and fall more than 100 feet.
I'm talking, of course, about Niagara Falls.
I've visited the falls dozens of times, and not once have they failed to leave me astoni