In landscaping, thinking about the design in three dimensions can always help you to come up with options that work with nature and with the terrain. Having some areas of the garden lower than others is one option that can help achieve the results you are looking for.  A “sunken garden” may mean different things to different people. So, to make sure that you meet your goals for a sunken garden, it is important to determine exactly what you mean by this concept, and what precisely you hope to achieve.  What Is a Sunken Garden? This term refers to an area of your garden that is lower than the surrounding…