Climb the five-story observation tower to fully appreciate the nooks, crevices and quartzite wonderland the Big Sioux River carves into this 123-acre park, then make time to climb and scamper across the rocks and past historic ruins of the mill that helped build the city.

The park connects to the Big Sioux River Recreation Trail and Greenway.

No admission; free parking.

Hours
Open 5 a.m. to 10 p.m. or until midnight during daylight savings time