I highly recommend you to visit this place, and ready to guide you, because this place is my Doctorate Final Project from University of Canberra (2000-2005)
Taman Sari also known as Taman Sari Water Castle is a site of a former royal garden of the Sultanate of Yogyakarta. It is located about 2 km south within the grounds of the Kraton, Yogyakarta, Indonesia. Built in mid 18th century, the Taman Sari had multiple functions, such as a resting area, a workshop, a meditation area, a defense area, and a hiding place.
Gapuro Agung – West Gate
Gedong Kenongo which surrounded by Segaran Lake (long long time ago)
Gapuro Panggung – East Gate
more information, you may buy my book :
Here the air-photograph, maybe can give more information :