Sanggar Agung Temple or Hong San Tang is a Chinese temple in Surabaya dedicated to Chinese deities and other Asian religious icons. It is located within the Pantai Ria amusement park and become a tourist destination, even though it is originally a worship place for Tridharma followers.
The name of Sanggar Agung is derived from Indonesian language which can be translated as Great Hall.The main icon of this temple is a 20 meters tall statue of Guan Yin on the waterfront, as a symbol that this temple is dedicated to Nan Hai Guan Shi Yin Pu Sa or Guan Yin Bodhisattva of the South Sea. The giant statue was built after one of its employees saw a women dressed in white walking on the sea as she was about closing the temple at night, believed as the appearance of Guan Yin herself. The other icon is the giant Phra Phrom statue covered with gold.