Here are two more pictures taken in Jiuzhagou, China.
I must admit that they illustrate more of serene scenery than mere boundaries.
The first one appears to me to be an infinity pool with water flowing towards the temple.
Somewhere between the lake and the temple must be a boundary – a boundary which is hidden by the fact that there is a fall between them.
The picture was taken at a high altitude in Huanglong, a few thousand metres above sea level.
In the second picture, there is a definite boundary – a timber fence which separates the visitors from the hills and lake below.
Mentally, the boundaries are just invisible, as you have become immersed in Nature!
retireediary 