indoor sunken courtyard actual scene

Quick answer：

A sunken courtyard in an indoor setting is a design feature where the courtyard is lower in elevation than the surrounding areas of the building. This creates a cozy and secluded space within the structure. Such courtyards are often used for relaxation, gardening, or as a transition area between different levels of the building. They can enhance the architectural aesthetics and provide natural light and ventilation to the interior spaces.