Outdoor sunken courtyard floor plan

Quick answer：

An outdoor sunken courtyard floor plan is a design layout for a courtyard that is situated below ground level. It often includes features such as a garden, seating areas, and paths, all designed to take advantage of the sunken space. These types of courtyards are commonly found in traditional Chinese architecture, where they are known as 'Yuan Lin' or 'moon gate garden'. They can also be used in modern architecture for aesthetic and functional purposes.