Passing the Marble Boat toward the north and behind the Longevity Hill, the Kunming Lake is the part of the park narrowing significantly and forming the Back Lake (后湖Hou Hu). Covered with many structures and surrounded by water, the lake is a calm and cool place where taking some rest after the turmoil of Beijing city.

The Back Lake, called that way for it is secluded and quiet, wandering its way varying in width and rendering a great deal of fun and amusement. Little area representing the most famous areas of China, the Back Lake is a jewel of history. In the western section, peculiar huge rocks perched on the banks are a vivid representation of the marvelous scenery of the Three Gorges of the Yangtze River. The section in the middle of the lake is characterized by the Suzhou Market Street with shops lining on both banks, a unique scene of the Water Town south of the Yangtze River. This tranquil lake ends at the Garden of Harmonious Interests which serves as a grandiose epilogue.