Pony Creek Park is a park in Oak Township, Mills County, Iowa, United States, northwest of Glenwood. Centered the Pony Creek Lake, it offers boating, picnicking, and fishing areas. Other features of the park include woods, a camping area, virgin prairie, and a viewing area for the local loess topography. The park cover , and is administered by Mills County. In 1971, it was listed on the National Register of Historic Places, because at the time it was known to contain at least two archaeologically important prehistoric Plains Indian earthen lodges, and the only ones in the region that were on public land that might be preserved. Davis Oriole Earthlodge One of the lodges at the site, the Davis Oriole Earthlodge Site, was designated a National Historic Landmark in 2012; it is one of the best-preserved lodges known of this type. It was first discovered in 1991 by D.D. Davis, an amateur archaeologist. Due to mapping errors, it was not relocated until 2008, when it was found under one of the park's main trails. The lodge measures about , with its surface between below the modern surface. The lodge underwent a careful and minimal excavation in 2009 to confirm its integrity, yielding information about its construction, and fragments of pottery used by its inhabitants. When the lodge was abandoned, it was apparently burned, collapsing its roof and charring its walls. See also List of National Historic Landmarks in Iowa National Register of Historic Places listings in Mills County, Iowa References Protected areas of Mills County, Iowa Parks on the National Register of Historic Places in Iowa National Historic Landmarks in Iowa National Register of Historic Places in Mills County, Iowa