Water occupies an important place in the Dream Lake Garden. Water, which forms the Earth's arteries, symbolizes both life and feminine principle of the universe (yin). Its flat surface works like a mirror and seems to increase the dimensions of the surroundings. Water is essential to the representation of nature as a whole, and its horizontal ligne counterbalances the effect of the mountains. Water is one of the dominant, unifying elements of this garden.

The lake is 60 meters long by 40 meters wide. Reflexions, along with the bridges spanning the water's branches, serve to make the garden appear even larger.

In some places, rock comes into contact with water; near the falls, large rocks emerge from the water. Rock and water are opposites : the water is yin, the rock yang. They are opposites, but they are linked, since they are two elements of a whole. From contrast and complementary, harmony is born.