The rink at Čapadlo offers a view of Prague Castle right from the banks of the Vltava. People who are concerned about the environment can go to Střelecký ostrov. The rink there is designed to use no electricity or water, and requires minimal maintenance. Several rinks operated by the city districts have free entry, but these tend to get crowded. The ones operated by shopping malls ten do have admission fees, but they also are less crowded and offer a wider range of services.