Double Heart Stone Weir

This is my new desktop image. 

I would like to visit it someday. It is a stone weir at the Penghu island in Taiwan, a traditional method of fishing. fishermen used to pile up stonewalls when the tide is flat and the rising tide will bring in fish. When the tide goes back down, the fish is trapped within the stonewalls, then the fishermen can easily catch fish.

Usually there is only one layer of wall. This is the only one that is built with two layers of walls. People speculate that the first one was built too deep into the ocean and the fish was getting away, so the fishermen built the second layer and accidentally create the double heart shape.