This traveling exhibit from the Lewis and Clark Trail Heritage Foundation uses large-scale reproductions of historic maps, photos, and explanatory text to show how America looked before the journey of Lewis and Clark, and what it looked like after.  Using cutting-edge scientific techniques and methods as old as humanity, they created a new portrait of America so persuasive we still recognize it today.  This exhibit shows how they did it.

 FREE.

703-385-8414.