Each summer in July, and winter in December, people gather for a festival celebrating the arts, culture and history of the Haudenosaunee (Iroquois) at Ganondagan, the only U.S. National Landmark dedicated to Native American culture east of the Mississippi. On a year-round basis, visit this site where thousands of Seneca lived 300 years ago, tour a full-size replica of a 17th-century Seneca Bark Longhouse walk miles of self-guided trails, climb the mesa where a huge palisaded granary stored hundreds of thousands of bushels of corn, and learn about the destruction of Ganondagan, Town of Peace, in 1687.