picture of a sunken courtyard on a terrace

Quick answer：

Sunken courtyards are an architectural feature where a garden or courtyard is designed to be lower than the surrounding ground level. They are often found in residential buildings, especially in modern homes, as they can provide a sense of privacy and tranquility. The image of a sunken courtyard on a terrace would showcase such a design, likely featuring plants, seating areas, and possibly water features, all situated below the level of the terrace. These courtyards can serve as outdoor living spaces, offering a sheltered environment for relaxation and leisure activities.