Belek is a township with own municipality in Serik district in Turkey's Antalya Province. The local population varies between 750 and 10,000 in low and high season, respectively. Belek is one of the centers of Turkey's tourism industry and is as such home to more than thirty four-star and five-star hotels and many other accommodation, services and entertainment facilities. The town and the surrounding area are famous for their spas and mineral waters received from seven springs. Belek is a developing golf center. In 2012 it hosted the Turkish Airlines World Golf Final and in 2013 it hosted the Turkish Airlines Open. The Kurşunlu Waterfall is a place in Belek. There are over 100 bird species living by this natural wonder. The hidden cave at the back of the waterfall is a popular place for visiting. Near Belek there is the Hellenistic city of Perge, which is rated second after Ephesus and the great amphitheater of Aspendos that still today can hold over 15.000 spectators. The ancient Aspendos amphitheatre holds 20,000 people, is over 2000 years old and still hosts open- air classical, ballet and opera festivals today. The Roman ruins at Perge are some of the best preserved archaeological sites in Turkey. Side is one of the best known classical sites in Turkey.