There's some parking behind the Philadelphia Museum of Art, but the Art museum is on a traffic circle and getting to the parking can be confusing if you're not familiar with the area. It's a stop in the Hop On Hop Off buses if you are thinking of doing one of those. The Rocky Statue is to the right of the "Rocky Steps" (the ones people run up like Rocky. There's a nice view straight down the Benjamin Franklin Parkway from the top of the steps. BTW, the Art Museum itself is world class.

Per quanto ne so, essendo esposta al pubblico in un'area aperta, alla destra della scalinata, dovrebbe essere sempre aperta. Non si trova all'interno di un locale.

Pay? Is in the street, in a public space.

Hola No fui al gimnasio, lo siento. El paseo por la avenida es muy agradable. Un saludo

Not difficult at all! And if you put "The Eye of the Tiger" you enjoy the exercise!!!

Pay only in sweat and shortness of breath. Awesome view of the city. The statue is free too. But there's always a line. Parking is tough. There are meters along the parkway, and pay lots at the art museum and Franklin institute.

Maybe a wedding party getting pictures taken

We didn't stay in the city. We stayed in Horsham, where we were able to find a relatively inexpensive hotel that had free parking, breakfast, and wifi. It took us about 30 minutes to drive to Independence Park. If you have a car and you're willing to do a bit of driving, you might consider staying in one of the suburban towns just outside the city.