Tallgrass prairie once covered 170 million acres but has been reduced by about 96 percent, leaving only small fragments except for a relatively large contiguous tract in the Flint Hills of Kansas and Oklahoma. Tallgrass Prairie National Preserve includes a small portion of the Flint Hills and preserves important cultural stories of this landscape, including the transition from open cattle range to enclosed cattle ranches. Operated in partnership between the National Park Service and The Nature Conservancy, it conserves, protects, and interprets the cultural and natural resources of this valuable prairie landscape, where visitors can experience guided tours, living history programs, educational activities, special events, the historic ranch headquarters, a working cattle ranch, trails, fishing, bird watching, and a bison herd among wide-open scenic views.