An area at the confluence of the Columbia and Willamette rivers was once home to a thriving Native American village. Hidden underground in a section of the Ridgefield National Wildlife Refuge near Vancouver are clues to an ancient culture that occupied the land from around 1450 to 1835. Lewis and Clark were greeted by villagers when they visited the area 200 years ago. Excavations in the 1990s uncovered over 10,000 artifacts.