Putingyuan refers to a traditional Chinese architectural feature where a courtyard is situated below the level of the surrounding ground. It is often found in the southern Chinese province of Fujian, particularly in Putian City. Sunken courtyards are designed to maximize privacy and to create a harmonious blend between the natural and built environments. They are characterized by their enclosed space, surrounded by walls or buildings, and may feature various garden elements such as ponds, pavilions, and plants. To find pictures of Putingyuan sunken courtyards, one can search online image databases or visit historical sites in Putian.