"The trees ended at the headwaters of the spring where he came upon a mountain. In it, he glimpsed a small opening through which light seemed to shine." Thus did Jin-Dynasty poet Tao Yuanming describe the approach to "Peach Blossom Spring," his legendary utopia to which no one could ever return.
「林盡水源，便得一山；山有小口，彷若有光。」