From A Wiki of Ice and Fire
and the location of Sunspear
The Water Gardens is a palace with gardens and waterworks that is the private residence of the rulers of Dorne. It is located on a beach next to the sea, three leagues to the west of Sunspear on a coastal road
The Water Gardens were raised by Prince Maron Martell as a gift for his new bride, Princess Daenerys Targaryen, to mark the union of Dorne to the rest of the Seven Kingdoms. Pale pink marble paves the gardens and courtyard. Terraces overlooking the numerous pools and fountains of the Water Gardens, shaded by blood orange trees, can be reached via a fluted pillar gallery leading to a triple archway.
The Water Gardens are pleasant in autumn: hot days, cool nights, the salt breeze blowing in from the sea, and fountains and pools to admire and play in. Children from all ranks and areas of Dorne are sent to the Water Gardens to foster, where they play together at the beach, pools and fountains and in the water.  Prince Doran Martell watches generations of children play there as he relaxes and thinks.
||The Water Gardens are my favorite place in this world. 
- Prince Doran Martell
, to Ser Balon Swann
Chapters that take place at the Water Gardens
References and Notes