negative one-level sunken courtyard pictures

Quick answer：

Sunken courtyards are a landscape design feature where a courtyard is below ground level, creating a sense of privacy and a natural, serene environment. These courtyards can be found in various architectural styles and are often used in residential, commercial, and institutional buildings. The images of sunken courtyards typically showcase the design elements such as steps, walls, plants, and water features, emphasizing the contrast between the sunken area and the surrounding ground level.