The largest of the parks set up for Street Workout made until July 2014 was built on the premises of CSiR in Płońsk at ul. Kopernika 3. The design of the park is extended with an additional 5 poles version of squares from Rzeszów, Zgorzelec and Zdzieszowice. It consists of a vertical and horizontal ladder, double sets and single bars of various heights, a slanted bench and a set of parallel high and low handrails. As the surface, perforated rubber mats laid on mechanically hardened ground were used, similarly to the first and second park in Bemowo in Warsaw.