What if you could travel between all of Washington's National Parks by subway? Never actually going to happen, of course, but the folks at the Sierra Club created a map that posits what it would look like if you could. In fact, their map connects all of the major National Parks in the United States. It's absurd, but, it would make it a whole lot easier to "hike" the Cascades, we'll tell you that. [io9]
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