Horse blocking wall introduction: Horse blocking wall is a wall built at a dangerous point on the post road to prevent horse racing officials from falling off the cliff. Generally, it is more than 1 meter high and about 0.8 meters wide. The length depends on the dangerous road conditions. Horse-blocking walls are divided into earth walls and stone walls. The earth wall is made of pebbles with earth in the middle. The stone wall is made of large bluestone.
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