LewisAndClark.org is an information center along a trail through American history. With a capacity to handle more than 10,000 simultaneous visitors, people the world over gather there to explore the past, add links, engage discussions, and check the calendar for local upcoming events. A students and teachers section acts as a guide for classroom projects and study sessions. Through the Ad Council and Metropolitan Group, Concrete produced a site where visitors can both have a lasting experience and leave their own unique imprint along the historical trail.