How Big Are Historical Things, Really?

I was curious how big the Great Wall of China was compared to New York City. Turns out the entire Eastern Seaboard is a better comparison. BBC's Dimensions lets you awesomely map historical happenings over any geography of your choosing.

The site lets you size up great cities of history, environmental disasters, World War II battles and more, with any landmass in the world. The results are often surprising.

What a tiny little moon you are! Or maybe I just haven't been giving Australia enough geographic credit? [BBC Dimensions via Kottke]

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