Open sunken courtyard picture

Quick answer：

A sunken courtyard is a garden or courtyard that is located below the level of the surrounding area. These courtyards often feature a lower level than the building or the street, creating a sense of privacy and intimacy. The term 'open' implies that the courtyard is accessible and visible, possibly with open walls or architectural elements that allow for interaction with the surrounding space. Pictures of such courtyards typically showcase the unique design, landscaping, and architectural details that define this type of garden space.