Many of the southern suburbs (such as Alimos, Palaio Faliro, Elliniko, Glyfada, Voula, Vouliagmeni and Varkiza) known as the Athens Riviera, host a number of sandy beaches, most of which are operated by the Greek National Tourism Organisation and require an entrance fee. Casinos operate on both Mount Parnitha, some from downtown Athens (accessible by car or cable car), and the nearby town of Loutraki (accessible by car via the Athens - Corinth National Highway, or the suburban rail service Proastiakos).