The Willamette Heritage Center preserves and interprets the history of the Mid-Willamette Valley. Its five acre historical property includes the 1841 Jason Lee House and Methodist Parsonage (the oldest standing wooden frame houses in the Pacific Northwest), the John D. Boon House (1847) and Pleasant Grove Church (1854), built by Oregon Trail immigrants. The 1896 Thomas Kay Woolen Mill, a National Park Service-designated American Treasure, vividly tells the story of industrialization in the Mid-Willamette Valley. Changing exhibits at the Willamette Heritage Center explore and highlight the rich and diverse cultural heritage of the Mid-Willamette Valley. $2 off admission with National Trust for Historic Preservation card.