Falls park

talk page. Falls Park is a public park in north central Sioux Falls, South Dakota, surrounding the city's waterfalls. The park includes a cafe, an observation tower, and the remains of an old mill.The park comprises over 128 acres just north of downtown, along the Big Sioux River. An average of 28 012,0472 liters  of water fall 30 meters per second. There are some viewing platforms, including the five-story observation tower. Falls Park includes some of Sioux Falls' oldest buildings.