| http://www.w3.org/ns/prov#value | - Washington, D.C.'s 19 Smithsonian Museums, including the Air & Space Museum, Museum of Natural History and the National Museum of American History, are all, yep!, free!) 10- Tour National Parks (Idea: Tour all the US parks including Acadia in Maine, Yellowstone, and the Great Smoky Mountains in Tennessee.)
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