Great Wall of Gorgan with the names of “Red wall” or “Red Snake” is one of the most obvious Iranian architectural monuments, the third long wall of the world after the Great Walls of China and Germany. This was a unique defensive wall in which the local materials have been produced the supplied from the adjacent of wall in the past, constructed by Iranian architects. The color of most bricks used in this wall is inclined to be something between a pale goldenrod and red.