Founded by a king of Pergamum in around 190 BC, Hierapolis was a cure center under the Roman Empire because of the magical springs of Pamukkale nearby.
Necropolis -- largest anceint graveyard in Anatolia
Arch of Domitian - the north gate to the colonnaded street
Frontinus Street - the city's main north-south commercial axis
Agora
Roman Theatre -- built in 200BC could seat 12000 people